trek fuel ex 8 vs 9.8

FIRST RIDE REVIEW

The new trek fuel ex review.

Photos & Words by Dario DiGiulio

As mountain biking has evolved into what it is today, the trails we ride on have slowly but surely raised the bar of what modern bikes have to keep up with. Sure, some tracks have been sanitized over time, but there’s no question that the pointy end of the sport has kept pushing forward. As a result, trail bikes have had to pick up the pace to match the expectations of the average rider, leading to more capable and confident rigs with every new model. Stepping up to the plate, we have the evolved version of the Trek Fuel EX, Trek’s mainstay trail bike. This time it’s really meant to do it all, riding anywhere and doing anything. Being this adaptable can be a tricky task though, so has Trek painted themselves into a corner?

The new Trek Fuel EX breaks just about every mold that the prior generations had fit into, with a full-on redesign for the new model. The name of the game here is adaptability, whether in the geometry, the suspension kinematics, or even what size wheels you’ll run. Thanks to their Mino Link flip chip and two sets of press-in headset cups, you can shift the character of this bike drastically to suit your terrain and preference. As a result, it’s a bit hard to parse out the specific geometry of the bike (however Trek’s site features a geometry tool to let you do so), so I’ll just speak to it in its most neutral form, which is where many will likely settle. There are a whopping 8 size variations to this bike from XS to XXL, so it’s worth digging through the geometry tables to see which might suit you best. They’re all sporting 140mm of rear travel with a 150mm fork, upping the numbers on the prior generation by 10mm.

I’ve been testing the large frame, which puts the reach and stack at around 485mm and 621mm, which are in line with the majority of the industry right now. In keeping with the new Trek Fuel EX’s theme of being adaptable and capable. In its neutral-low setting, the bike comes with a 64.5-degree head tube angle and the effective seat tube angle sits at 77.2-degrees. Chainstays shift with the frame size, and on a large come in at 440mm. Thanks to the Mino Link flip chip, you can adjust bottom bracket height by 8mm up from the slammed 38mm drop in stock configuration, with a 0.6° steeper head tube and seat tube angle. The more significant head tube adjustment comes from the independent press-in headset cups that Trek supplies, which can steepen or slacken things by a full degree, giving a very wide range of handling characteristics. The last frame toggle is the progression flip chip, offering a simple more or less option to tailor the suspension feel and offer uncompromised coil shock compatibility.

As is trend right now, you can set the Fuel Ex up as a mullet, simply by popping a 27.5” wheel in the rear, swapping the Mino Link to high mode, and bumping up fork travel to 160mm. The bike comes stock as a 29er front and rear (or 27.5″ in XS and Small), so you’ll have to make this change on your own accord.

A notable thing lacking from the newest Fuel EX its the Knock Block – you’ll find no such thing on this frame. X-up fans take note, as this is a big move for the engineers in Waterloo, Wisconsin, and was necessary to achieve the headset adjustment range they wanted. Trek has also moved away from the RE:aktiv damper shock, now simply relying on an off-the-shelf model. Still included in the frames are the handy-dandy stash box in the down tube, with what I think might be the best weather sealing of any of the options on the market at this point, and a neat BITS tool roll.

Build kits come in as many flavors as the sizes, and the range of options is quite extensive, beginning at a respectable $3,699. I’ve been on the highest end build, the 9.9 AXS especial, coming in at a healthy $10,749. From Bontrager Line 30 carbon wheels, to the RSL one-piece carbon cockpit, to the XX1 drivetrain, just about everything is as nice as it gets, as you’d hope for this kind of money.

At my height of 6’3”, the geo combination of the Neutral-Low-More flip chip configuration on the large size makes for a really comfortable fit,  one that feels stable enough at speed while still remaining lively for your average trail. I started my time testing the bright yellow Trek up in Whistler, riding some gnarly rocky pedal-access trails around the Valley. This was a great context for deciding where I stood on the less or more progression debate, and I settled on the latter end of the spectrum. Increased bottom-out resistance and a more supple top of travel were worth a slightly punchier suspension feel, and I stand by that choice for most of the riding I have around me. On my home trails in Bellingham, the Fuel has been a choice companion for fast and fun rides in our local trail systems, where technical and engaging climbs lead to fast, rooty, and jump-filled descents. My general synopsis is that this is a bike that loves to ride fast, both up and down.

The climbing characteristics are comfortable and neutral, without wallowing too much or lacking grip in trickier terrain. Like many of the take-aways of the bike as it comes stock, things are extra-medium, in the best way. Compared to the new Hightower, the bike has slightly less support, but is significantly better in rough terrain and successive hits. Compared to the Stumpjumper EVO, the Fuel EX is definitely more of a trail bike, less of the all-mountain enduro-lite ride that the Specialized offers. All three bikes serve as a nice gradient from the lighter and sportier end of the trail spectrum to the burlier and more capable side of the category. Sitting pretty right in the middle is the Fuel EX, but I’m sure one could tweak it to either of the other extremes, given how much variability is baked into this frame.

Build kit notes are mostly positive, which you’d hope to see from the highest end build. My main gripe is with the Bontrager SE5 tires, which are some the least confidence-inspiring I’ve ridden in recent memory. The casing and tread pattern are fine, but the compound doesn’t seem to want to hook up anywhere, whether it’s dry loose terrain, rock slabs, and especially wet roots. This would be an immediate swap in my book, and I’d just keep the stock tires to run in the rear when conditions are dry and beat at the peak of summer.

The removable shuttle pad doesn’t seem to want to stay close to the frame, and bows out slightly when attached, giving the downtime a funny bulged look to it. One other frame annoyance has been a recurring suspension knock, despite chasing through every bolt in the linkage with a torque wrench. I still have yet to find the culprit, but luckily it’s not very noticeable when riding.

As a system, I’ve been more than impressed by Trek’s work on the new Fuel EX. Not only does it feel quick and confidant in the stock configuration, it also offers a whole host of layout options to better cater the bike to your preferences.

THE WOLF’S FIRST IMPRESSION

To close out our review of the new Trek Fuel Ex, it’s clear that Trek’s engineers and designers set out to design a bike that caters to that wide center of the market – the trail bike – where most riders spend their time, and where a bike can take many forms. In that goal, they found success. Sure some riders may feel the new Fuel EX has departed from what they were used to and liked about the bike, but many other riders will likely welcome the advancements in capability and confidence on the trail. The Fuel EX is a highly adaptable bike that feels comfortable in a really wide variety of terrain but doesn’t confuse itself for anything more or less. Bike riders, rejoice.

TREK FUEL EX 7

Price: $3,699.99

Frame: Alpha Platinum Aluminum, internal storage | 140mm Fork: RockShox 35 Gold RL | 150mm Shock: Fox Performance Float EVOL

Drivetrain: Shimano SLX/XT Brakes: Shimano MT420 4-piston

Wheelset: Bontrager Line Comp 30, Rapid Drive 108

TREK FUEL EX 8

Price: $4,299

Frame: Alpha Platinum Aluminum, internal storage | 140mm Fork: Fox Rhythm 36 | 150mm Shock: Fox Performance Float X

Drivetrain: Shimano XT M8100 Brakes: Shimano Deore M6120

TREK FUEL EX 9.7

Price: $6,249.99

Frame: OLCV Mountain Carbon, internal storage | 140mm Fork: Fox Rhythm 36 | 150mm Shock: Fox Performance Float X

Drivetrain: Shimano SLX/XT Brakes: Shimano Deore M6120

TREK FUEL EX 9.8

GX AXS Price: $7,699.99 XT Price: $6,749.99

Frame: OLCV Mountain Carbon, internal storage | 140mm Fork: Fox Performance 36 | 150mm Shock: Fox Performance Float X

Wheelset: Bontrager Line Elite 30, OCLV Carbon, Rapid Drive 108

GX AXS BUILD Drivetrain: SRAM GX Eagle AXS Brakes: SRAM CODE R

XT BUILD Drivetrain: Shimano XT M8100 Brakes: Shimano XT M8120

TREK FUEL EX 9.9

XX1 AXS Price: $10,749.99 XTR Price: $9,749.99

Frame: OLCV Mountain Carbon, internal storage | 140mm Fork: Fox Factory 36 | 150mm Shock: Fox Factory Float X

Wheelset: Bontrager Line Pro 30, OCLV Carbon, Rapid Drive 108

XX1 AXS BUILD Drivetrain: SRAM XX1 Eagle AXS Brakes: SRAM CODE RSC

XT BUILD Drivetrain: Shimano XTR M9100 Brakes: Shimano XTR M9120

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Trek Fuel EX 9.8 GX 2021 in review – Trail performance over bling components

The Trek Fuel EX has proven itself as an excellent all-rounder in the past. This year, the American brand enters the race with the € 5,999 Trek Fuel EX 9.8 GX, which combines a high-end frame with a mid-level spec but still features Trek’s own Thru Shaft shock technology. So does it always have to be top-spec? How big is the difference in performance and how does the Fuel EX 9.8 GX fare against its more expensive peers?

For an overview of the test fleet head to the group test: The best mountainbike of 2021 – 22 models in review

The Trek Fuel EX 9.8 GX features an elegant carbon frame and makes a very high-quality impression with its semi-translucent red finish with visible carbon fibres. It has 140 mm travel at the front and 130 mm at the rear and comes equipped with a Thru Shaft technology shock, developed specially by RockShox for Trek. The shock uses fewer seals, which is claimed to reduce friction and improve sensitivity. Trek’s proprietary internal storage compartment in the down tube offers enough room to stow a spare inner tube, a CO2 cartridge and a few trail snacks. A long TPU down tube guard protects the carbon frame from impacts and stray rocks. The chainstay protector prevents chain slap and ensures a quiet ride, making the Trek one of the quietest bikes in the test. The integrated Knock Block limits the steering angle and thus prevents the fork crown from damaging the frame or cables from tearing off. You never hit that limit on the trail but it could pose some issues when transporting the bike.

The spec of the Trek Fuel EX proves that affordable bikes can deliver

For this test, Trek didn’t send us the top-of-the-range model we requested but the more affordable Fuel EX 9.8 GX model. This retails at € 5,999 and comes equipped with a 140 mm FOX 36 Performance fork, which uses the worse-performing FIT4 damper rather than the top-end GRIP2 cartridge but still keeps up with the FIT4 forks on the trail. At the rear, a FOX Performance Float Thru Shaft shock controls 130 mm travel. The 12-speed SRAM GX drivetrain with a 10–52 cassette delivers the same gear range and shifting performance as SRAM’s more expensive offerings and only weighs a few grams more. Braking is taken care of by SRAM G2 RS brakes, paired with a 200 mm rotor at the front and a smaller 180 mm disc at the rear: unfortunately, the latter doesn’t do justice to the potential of the Fuel EX, requiring strong fingers and tending to overheat on long descents.

For all other components, Trek rely on in-house Bontrager components. That includes a 170 mm Line Elite dropper post and 780 mm carbon bars. The in-house Line Elite 30 carbon wheelset rolls on wide, puncture-prone 2.6” Bontrager XR4 Team Issue tires. Ironically, the “Issue” designation is rather fitting. To avoid pinch flats and, in the worst case, irreversible damage to the carbon rims, you’ll have to run very high air pressures which only exacerbates the limited grip of the low-profile tread. Add to that the hard compound and the XR4 generates too little traction. We recommend upgrading the standard tires to a narrower 2.4″ or 2.5” model with a more robust casing.The Trek Fuel EX 9.8 GX in size L hits the scales at 13.5 kg.

Uphill, the Fuel EX generates lots of traction and offers a high level of comfort, delivering an impressive performance in all imaginable uphill situations.

Trek Fuel EX 9.8 GX

Specifications.

Fork FOX 36 Elite 140 mm Rear Shock FOX DPS Elite EVOL 130 mm Seatpost Bontrager Line Elite 170 mm Brakes SRAM G2 RS 200/180 mm Drivetrain SRAM GX Eagle 1x12 Stem Bontrager Line Pro (35) 45 mm Handlebar Bontrager Line Pro OCVL 780 mm Wheelset Bontrager Line Elite 30 29" Tires Bontrager XR4 Team Issue 2.6

Technical Data

Size XS S M M/L L XL Weight 13.48 kg

The geometry of the Trek Fuel EX 9.8 GX in detail

The Fuel EX is available in six sizes from XS to XL. For the smallest XS and S frames, Trek have adapted the shape of the top tube to give short riders more freedom of movement. In addition, the smallest XS frame is only available with 27.5” wheels, while the size S is available with both 29” and 27.5” wheels. All other frames roll on big 29” wheels. The intermediate M/L is a real highlight, providing many riders the choice of at least two suitable frames. The reach of our Fuel EX test bike (size L) is 470 mm. Chainstays are 437 mm across all sizes and the geometry of the Fuel EX can be adjusted via a flip-chip in the rocker. We recommend the low setting, which slackens the head angle by 0.5° – this is the setting we used the most in this test!

More comfort is almost impossible! The Trek Fuel EX 9.8 GX on the trail

As far as riding comfort goes, hardly any bike in our big 2021 group test beats the Trek Fuel EX. The pedalling position is balanced and comfortable and the suspension works efficiently. Even without the climb switch, the Fuel EX climbs willingly while the suspension tracks the ground sensitively, ensuring a high level of comfort and sufficient traction to negotiate technical uphills with ease. While it’s not as nimble as strong climbers like the Yeti SB115, the Fuel EX shines with its comfortable pedalling position, which also makes it an excellent option for long rides. Uphill, it has nothing to begrudge its little brother, the Trek Top Fuel 9.9 X01, while downhill it leaves it behind in a cloud of dust. The Fuel EX strikes a great balance between nimbleness and smoothness, inspiring sufficient confidence on steep descents thanks to its high front.

On steep, rough terrain, the bike inspires confidence and ensures a reasonably smooth ride.

Tuning-tips: narrower tires with a more aggressive tread | heavy riders should run a bigger brake rotor at the rear to unlock the full potential of the bike

On narrow trails and berms, it’s playful and agile. While the rear end lacks end-stroke progression, the suspension still provides sufficient support for active riding maneuvers, generating good traction and remaining composed even on fast and rough trail sections. As a result, the Fuel EX feels most comfortable on flowing trails and singletrack. However, when the trails get too rough and more closely resemble downhill tracks, the rear end reaches its limit – as a result, the Fuel EX struggles to keep up with more capable bikes like the Canyon Spectral. Here, the limiting factor is the rear tire, which offers little puncture protection, has a very shallow profile and has vague handling due to its large surface area. In corners and under braking, the lack of traction costs the Trek a great deal of precision.

Riding Characteristics

Value for money, intended use.

Despite the affordable spec, the Trek Fuel EX 9.8 GX convinces with a high level of comfort and good traction on all sorts of climbs. Downhill, it shines with its intuitive and balanced handling on flowing trails and singletracks. The build quality is high and frame details such as the integrated storage compartment are well-thought-out. Unfortunately, the spec isn’t perfect and crucial components such as the tires and brakes limit the riding fun.

• very comfortable uphill
• intuitive handling
• high-quality frame with integrated storage compartment

• tires are very puncture prone and generate little traction
• brakes don't do the bike’s potential justice

Find more information here trekbikes.com

The testfield

Get an overview of the grouptest here: The best mountainbike of 2021 – 22 models in review

All Bikes in this group test: Canyon Neuron CF SLX 9 (Click for review) | Canyon Spectral 29 LTD (Click for review) | Canyon Stoic 4 (Click for review) | FOCUS THRON 6.9 (Click for review) | Ibis Ripmo V2 (Click for review) | MERIDA eONE-SIXTY 10K (Click for review) | MERIDA NINETY-SIX 8000 (Click for review) | Nukeproof Reactor 290C (Click for review) | Orbea Rise M-Team (Click for review) | Propain Hugene (Click for review) | RAAW Jibb XTR Build (Click for review) | Rocky Mountain Instinct C70 (Click for review) | Santa Cruz 5010 X01 (Click for review) | Santa Cruz Tallboy CC X01 (Click for review) | SCOTT Ransom 900 Tuned AXS (Click for review) | Specialized S-Works Stumpjumper (Click for review) | Specialized S-Works Stumpjumper EVO (Click for review) | Specialized S-Works Turbo Levo SL (Click for review) | Trek Fuel EX 9.8 GX | Trek Top Fuel 9.9 X01 (Click for review) | Yeti SB115 TURQ3 (Click for review) | YT IZZO BLAZE 29 (Click for review)

This scale indicates how efficiently the bike climbs. It refers to both simple and technical climbs. Along with the suspension, the riding position and the weight of the bike all play a crucial role. ↩

How does the bike ride and descend? How spritely is the bike, how agile is it through corners, how much fun is it in tight sections and how quickly can it change direction? ↩

Is the bike stable at high speeds? Is it easy to stay in control in demanding terrain? How composed is it on rough trails? Stability is a combination of balanced geometry, good suspension and the right spec. ↩

This is all about how balanced the bike is and particularly about how well it corners. Balanced bikes require little physical effort from the rider and are very predictable. If a bike is unbalanced, the rider has to work hard to weight the front wheel to generate enough grip. However, experienced riders can have a lot of fun even with unbalanced bikes. ↩

How sensitive is the suspension over small bumps? Can it absorb hard impacts and does it soak up repeated hits? Plush suspension not only provides comfort and makes a bike more capable, but it also generates traction. The rating includes the fork and the rear suspension. ↩

This aspect mainly comes down to the suspension. How much pop does it have, does it suck up the rider’s input or is it supportive, and how agile and direct is the bike? ↩

We don’t calculate value for money in an excel spreadsheet or based on how high-end a bike is specced. We are more concerned with how a bike performs on the trail and how the bike benefits the rider. What good are the best components if the bike doesn’t perform well on the trail? Expensive bikes with a lower-end spec can offer very good value for money – provided they excel where it matters. Just as supposedly cheap bikes with good components can get a bad rating if they don’t deliver on the trail. ↩

No, it’s not about racing, it’s about efficiency. Fast, fleet-footed and efficient – those who want to speed along flowy singletrack and gravel roads need a defined and spritely bike that accelerates with ease and efficiency. Nevertheless, reliable components are important too. We interpret XC more like the Americans do: big back-country rides instead of a marathon or XC World Cup with the ultimate in lightweight construction! Uphill-downhill ratio: 80:30 (not everything has to be 100%!) ↩

...also known as mountain biking. Classic singletrack with roots, rocks and ledges – sometimes flowy, sometimes rough. For this, you need a bike with good all-round qualities, whether climbing or descending. Uphill-downhill ratio: 50:50 ↩

Even more extreme and challenging compared to Trail riding, riddled with every kind of obstacle: jumps, gaps, nasty rock gardens, ruts and roots. For this, you need (race)proven equipment that forgives mistakes and wouldn’t look out of place on a stage of the Enduro World Series. Climbing is just a means to an end. Uphill-downhill ratio: 30:70 ↩

Strictly speaking, a 200 mm travel downhill bike is the best choice for merciless tracks with big jumps, drops and the roughest terrain. Those would be the black or double-black-diamond tracks in a bike park. But as some of the EWS pros (including Sam Hill) have proven, it’s the riding skills and not the bike that define what you can ride with it. Climbing? On foot or with a shuttle, please! Uphill-downhill ratio: 10:90 ↩

You can find more info about our rating system in this article: Click here! ↩

Did you enjoy this article? If so, we would be stoked if you decide to support us with a monthly contribution. By becoming a supporter of ENDURO, you will help secure a sustainable future for high-quality mountain bike journalism. Click here to learn more .

Words: Peter Walker Photos: various

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About the author.

Peter Walker

As editor-in-chief, Peter is as much a man of action as he is of words. This expert, screw-driver-flexing two wheeled-whizz has many envy-inducing characteristics, including a background in motocross, several EWS race plates to his name, and more than 150 recorded days at Whistler Bike Park. However complex the bike and however steep the trail, he’s probably already nailed it, twice. Oh, and he can do it all on skinny tyres too. When it comes to guiding consumers, Peter cut his teeth at Vancouver’s oldest bike shop and now puts pen to paper on the daily translating this know-how into our editorial plan. When not tearing up Stuttgart’s local trails while testing bikes, he loves nothing more than loading up his self-renovated VW T5 and hitting the road. The fact that he’s a trained paramedic gives his colleagues reassurance out on the trails. So far we haven’t had to call him by his alias ‘Sani Peter’, so here’s hoping he keeps it right side up for the rest of his time here!

Mid-Term Review | 6 Weeks Aboard Our 2020 Trek Fuel EX 9.8 Long Term Test Bike

The not-so-minor details.

2020 Trek Fuel EX 9.8

Trek Bicycles Australia

https://www.trekbikes.com

12.74kg (in current spec configuration)

- Stupendously plush rear suspension - The Fox 36 has really stepped up the EX's appetite for gnar - New geometry brings masses of high-speed stability

- Rattling from the downtube trapdoor - Knock Block system works but creates practical annoyances - The 35mm carbon bars are overly stiff

Since receiving the 2020 Trek Fuel EX 9.8 test bike back in September , this muscly trail brawler has joined me on many a ride across the countryside. From my hometown of Bendigo in the Goldfields region, over to Beechworth in the Victorian High Country, the Fuel EX and I have so far enjoyed a few hundred kms of singletrack slashing, with plenty of saddle time to get to know one another. My early verdict of this long term test bike? It’s rapid. Very rapid.

But while the Fuel EX is absolutely humming now, it did take a bit of fine-tuning to get it all dialled in to how I like. And in recent weeks, I’ve also swapped out a few key components, including the drivetrain, brakes, wheelset and tyre combo, to see how the bike would handle with a different setup, while also providing the opportunity to review those parts separately.

Here we’re going to take a look at the current bike setup, with some detail on what settings I’ve settled on, and the changes we’ve made so far. If you’re after a more detailed look at exactly what’s new with this 130mm travel trail ripper, make sure you check out Mick’s story on the 2020 Trek Fuel EX from the launch, which includes a broader overview of the six-model Fuel EX lineup.

Suspension Tweaking

Having ridden many examples of the previous generation Fuel EX, I was initially surprised to find the suspension on the new bike to feel firmer than I was expecting. Previous versions have been plusher than a penthouse suite, particularly with the recent addition of the Thru-Shaft damper design in the Fuel EX’s rear shock, but the new bike didn’t feel quite as active.

So over the course of a couple of rides, I lowered both the fork and shock pressures, while also removing some volume spacers to help open up the end of the travel.

The Fox 36 Rhythm fork comes with four volume spacers inside the EVOL air spring as stock. I brought that down to two, and then to one single spacer. This improved the fork action for my 70kg riding weight, and I was able to access full travel more easily. The fork has bedded in quite a bit and become more supple over the last few weeks, so I’ve since added a 2nd volume spacer to regain some mid-stroke support.

With 68psi in the air spring, the rebound dial set 10 clicks off the slowest setting, and the compression lever set partway between Open and Medium, the fork is now spot-on. I really like the 36 Rhythm, even though it’s meant to be the ‘budget’ fork in the Fox line. At 2065g (confirmed) it is heavier than a comparable 34, but it gives the EX a really stout feel. Along with the robust carbon frame and slacker geometry, the new generation Fuel EX has quite the mini-Slash vibe about it.

I also tried a smaller 0.2³ volume spacer inside the rear shock, which did help to reduce the initial firmness I experienced. The shock felt smoother, but it was bottoming out too much on hefty landings, so I reinstalled the stock 0.4³ volume spacer. Compared to when the bike was fresh out of the box, the shock feels like it’s bedded in a lot, and it’s now exhibiting the buttery-plush performance I was first expecting.

And holy crap is this thing plush!

Trek recommends setting the rear shock between 25-33% sag, so I’ve got 150psi inside the air spring to put me around the 30% marker. Rebound is set just faster than halfway, at nine clicks from the slowest setting. With the shock settings dialled in, I’ve been thoroughly enjoying how responsive the back end is on the Fuel EX, and how it keeps the rear tyre glued to the ground. It’s reactivity to incoming obstacles, no matter how rapid-fire the hits are, is really quite something for a bike with just 130mm of travel.

With the Penske-Trek designed RE:aktiv damper inside, the blue compression switch alters between Open, Medium and Firm settings. The regressive damper design means that you can achieve a pretty firm platform in the Medium and Firm positions, with a super fast breakaway when enough pressure builds behind the valve to crack it open as you encounter a bump. In principle, it aims to achieve the same goal as the Specialized Brain damper. In practice, it isn’t as firm as a Brain shock, but it is much smoother and faster in its transition. And in my experience, it makes the Medium and Firm settings a whole lot more effective.

Whereas I’d only use a shock’s compression switch for riding on the road or on a really smooth fireroad climb, I’ve been able to utilise the Medium setting for technical singletrack climbs, where the increased platform helps to improve efficiency while also lifting the bike up a touch for more ground clearance. If the climb isn’t littered with ledgy rocks and roots, the Firm setting goes one step further. I generally prefer to leave my suspension wide open when I’m riding off-road, but the compression settings on the Fuel EX’s shock offer such distinct ride experiences that it’s worth utilising them to get the most out of the bike.

Groupset Change

The Fuel EX 9.8 comes stock in Australia with a SRAM GX Eagle groupset, which has thrown up zero surprises so far. However, we recently got our hands on the new Shimano SLX M7100 groupset , including a set of the new 4-piston brakes. While much of the media hype has centred around XT and XTR, we reckon the new 12-speed SLX groupset is more exciting, particularly as it comes in at a third of the price of XTR!

With the SLX groupset looking for a home, I removed the GX Eagle setup from the Fuel EX so I could fit the new SLX test components. So far the performance has been excellent – shifting under load is particularly impressive. The 4-pot brakes are also superb, with more power than Shimano’s 2-piston callipers, but noticeable better modulation to control that power.

Pricing is pretty similar between Shimano SLX and SRAM GX Eagle, but there are some key performance differences. Stay tuned for a separate in-depth comparison feature, and feel free to ask any questions you might have in the meantime.

It’s worth noting that you’ll need a Micro Spline freehub body to fit the new Shimano 12-speed cassettes. Depending on the wheelset you’ve got, that might be easier said than done. Bontrager is licensed to produce Micro Spline freehub bodies though, so it’s a question of popping into your local Trek dealer to purchase one. In my case, I had another set of test wheels with a DT Swiss 350 rear hub, so that was also an easy swap, as Micro Spline freehub bodies have been available from DT Swiss for well over a year now.

Lighter Wheels, Faster Tyres

Speaking of wheels, the Fuel EX 9.8 comes fitted with a set of Bontrager Line Carbon 30s as stock. These feature deep section carbon fibre rims with a 29mm inner width, and Bontrager TLR rim strips come fitted to create a reliably airtight seal.

During the initial build process, I was surprised to find that there were no tubes inside the tyres – these wheels are legit tubeless ready from the factory. Two bottles of Bontrager TLR sealant are supplied with the bike, so all you need to do is remove the valve cores, squeeze a bottle into each wheel, and you’re ready to roll. Nice!

It’s also worth pointing out that Bontrager now offers a 2-year crash replacement scheme with its carbon wheels, which is nice peace of mind. The Line Carbon 30s have been solid so far, though at 1908g on my scales, they’re not the lightest hoops out there.

Looking to inject a bit more speed into the Fuel EX, I decided to fit a set of Dirt Hoops from Melbourne-based brand, Curve Cycling. This is the ‘Wider 40’ model, which features carbon rims that measure 40mm externally and 30mm internally. With DT Swiss 350 hubs, Sapim CX-Ray spokes and a confirmed weight of just 1637g, they’ve helped to boost the bike’s acceleration and rolling speed noticeably. The only downside is the use of 18T ratchet plates in the rear hub, which feels comically slow compared to the 54 points of engagement in the Bontrager wheelset. I might look at popping in a 36T or 54T upgrade kit in the rear hub soon. For more info on the Dirt Hoops, take a gander at the detailed first look story here .

As for rubber, I’ve been consistently impressed with Bontrager’s latest XR4 tread pattern over the past couple of years. In its big 2.6in guise here, it’s supremely grippy and you can run them at quite low pressures – 18psi on the front and 20psi on the rear has worked well for me. The XR4 is a really versatile tyre, transcending dry to wet riding conditions, from loose to hardpack trail surfaces. For more aggressive riders though, I’d consider putting an XR5 up front though for more hold on loose and steep enduro-style trails.

Given their huge volume, the XR4s are a decent weight for a burly trail tyre, clocking in at around 920g each. They do put more rubber on the ground though, so they’re noticeably draggier than the 2.4in tyres that came as stock equipment on pre-2020 Fuel EX models. Along with the active suspension and the stock bike’s generous 13.2kg weight, the big volume tyres give the Fuel EX a robust and grounded demeanour on hectic, technical descents. On the flip side, it also contributes to a slightly lethargic feel on the climbs – at least compared to more slender and trail bikes in this travel bracket anyway.

If you’re after more rolling speed, a tyre change is a good way to do it. I fitted a pair of 2.4in wide Pirelli Scorpion tyres – a Scorpion M (Mixed) for the front, and a Scorpion R (Rear) for the back wheel. These are actually a very similar weight to the stock Bonty tyres, but they have a significantly faster rolling tread pattern. They’re also well suited to my local dry and dusty trails, including the Harcourt MTB Park and You Yangs, where the Pirellis manage the sandy soil composition mighty well.

Handlebar Switcheroo

In the search of more compliance, I’ve also recently switched up the Fuel EX’s cockpit. The stock Bontrager Line Pro bars are made from OCLV carbon fibre and feature a 35mm clamp diameter for the stem. Being very stiff, I’ve found them to be somewhat unforgiving on my hands and upper body – something I’ve experienced with a lot of 35mm bars. In my eyes, it remains as one of the most annoying standards to have permeated the mountain bike industry. Anywho…

So I recently fitted a set of Syncros Hixon iC 1.0 Rise handlebars that I’ve previously tested. These are one of the most compliant full-width bars I’ve ridden, and they’ve already made a noticeable difference in vibration damping on the front of the Fuel EX. Using a one-piece carbon fibre construction that integrates the steerer tube clamp into the centre of the bars, they’re also stupendously light at 273g. Remember, that’s the bar and the stem in one. Width is 800mm and you can get them with a ‘virtual’ stem length of 40mm or 50mm.

I’ve got the shorter option, which I think is a touch too short for the Fuel EX. The Medium frame has a 440mm reach, which I’ve found ideal for my 175cm height. It isn’t super long by today’s standards though, and the grips now feel a little too close. I’ll look at going back to a 50mm stem length with a different bar/stem combo at some point down the line.

On the note of the cockpit change, if you decide to fit a non-Bontrager stem to your Fuel EX, you will need an adapter so you can ditch the keyed Knock Block headset spacers. This adapter is a simple locking that bolts to the steerer tube directly above the headset, and you can get this small piece of alloy through a Trek dealer for $30.

For those wondering how our long term test bike has evolved, here are the finer details of what’s changed so far;

2020 Trek Fuel EX 9.8 Current Build Specs

• Frame |  OCLV Mountain Carbon Fibre, ABP Suspension Design, 130mm Travel
• Fork |  Fox 36 Float, Performance Series, GRIP Damper, 44mm Offset, 140mm Travel
• Shock |  Fox Float EVOL w/Thru-Shaft, Performance Series, RE:aktiv Damper, 210x55mm
• Wheels | Curve Dirt Hoops Wider 40, Carbon Rims, 30mm Inner Rim Width
• Tyres | Pirelli Scorpion M 2.2in Front & Scorpion R 2.2in Rear
• Drivetrain | Shimano SLX M7100 1×12 w/SLX 32T Cranks & 10-51T Cassette
• Brakes | Shimano SLX M7120 4-piston, 203mm Front & 180mm Rear Rotors
• Bar | Syncros Hixon iC 1.0 Rise Carbon, 20mm Rise, 800mm Width, 40mm Virtual Length
• Stem | Syncros Hixon iC 1.0 Rise Carbon, 40mm Virtual Length
• Seatpost | Bontrager Line Elite Dropper Post w/Shimano MT800 Lever, 150mm Travel
• Saddle |  Bontrager Arvada, Austenite Rails
• Confirmed Weight | 12.74kg (without pedals)

Any Problems So Far?

Nothing major. I did have a tricky time routing a new hydraulic line through the frame when I fitted the SLX 4-piston rear brake. The bolt-on Cable Freak ports are snug and pretty user-friendly, but there’s a very tight section just behind the main pivot where the rear brake line and derailleur cable exit the mainframe and then re-enter the chainstays. A Park Tool IR-1.2 cable routing kit ensured things didn’t get too sweary for me. I will admit that the routing does look very clean on the Fuel EX, but I’m still a bigger fan of externally-routed cabling.

The only other issue that’s popped up is a rattling noise that’s emanating from the trapdoor underneath the bottle cage. On our test bike, the fit isn’t quite 100% and there’s enough lateral movement where the locating stub at the base of the trapdoor clips into the frame that it causes a rattle when you have a bottle on board. It isn’t particularly loud, but when the rest of the bike is so stealthy quiet, it’s a right old pain in the arse.

I’ll note that this wasn’t a problem that Mick encountered with his test bike during the launch back in July. To see if this was an isolated issue with production models, I went to my local Trek dealer and found that out of the six bikes there with integrated downtube storage (including two Domane gravel bikes), only one frame had a properly tight fit between the frame and the trapdoor. After swapping around trapdoors, I’ve come to the conclusion that the sloppy fit on our test bike is partially from the door itself and partially in the frame component.

I really like the concept of integrated frame storage, but it absolutely needs to be perfect – especially on a $7K bike, and especially when Trek has copied the idea from one of its main rivals. We’re awaiting an official response from Trek, so we’ll keep you updated once we have a solution.

What’s Next?

Lots! With plenty of new riding destinations to explore this summer, I’m frothing to see how far I can take the Fuel EX.

One thing I’d like to investigate further is the option of fitting a longer travel fork (or a longer air shaft in the current fork), as I suspect the beefy carbon frame will handle it. A slightly longer fork combined with tougher tyre casings would open up the option of racing enduro – such is the capability of this bike. Speaking of endoooro, we’ve also got some fancy DT Swiss wheels that will no doubt end up on the Fuel EX shortly.

I also intend to flick the Mino Link into the high-and-steep position, since it comes set to low-and-slack out of the box. A little extra pedal clearance wouldn’t go astray, so I’ll be trying that out soon. I’m also keen to upgrade the shifter to an XT I-Spec EV model so I can remove one clamp from the bars, while also getting the double-upshift function that the SLX shifter misses out on.

Right, so that’s where we’re at with the 2020 Trek Fuel EX 9.8 long term test bike. What do you folks think? Have you got any questions for us about the new Fuel EX? Any parts you’d like to see us test on there? Be sure to let us know in the comments below!

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Trek Fuel EX 9.8 GX Review

• 25 years warranty
• light: 13,1 kg

OVERALL BIKE CHECK

The most importanten ratings of the Fuel EX 9.8 GX ⬤ in comparison to the competitor bikes of following categorie: (All Mountain up to 8000 €) ⬤ .

VALUE for MONEY CHECK

If you are keen on value for money, this is your chart. It shows you at a glance how many bike you get for 6599 €.

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Je steiler der Winkel des Sitzrohrs ist, desto effizienter können Sie in die Pedale treten.

• Frame Fuel EX Carbon
• Frame Material Carbon
• Fork Fox Performance 36, Float EVOL air spring, GRIP damper, tapered steerer, 44mm offset, Boost110, 15mm Kabolt axle, 140mm travel
• Spring Unit air
• Remote-Lockout yes
• Damper Size: XS, S, Fox Performance Float EVOL, RE:aktiv with Thru Shaft 3-position damper, tuned by Trek Suspension Lab, 210mm x 52.5mm; Size: S, M, ML, L, XL, Fox Performance Float EVOL, RE:aktiv with Thru Shaft 3-position damper, tuned by Trek Suspension Lab,
• Gearrange 520%
• Drivetrain 1x12
• Gear Lever SRAM GX Eagle, 12 speed
• Rear Derailleur SRAM GX Eagle
• Crank Size: XS, S, M, ML, L, SRAM GX Eagle, DUB, 30T alloy ring, Boost (52mm chainline), 170mm length; Size: S, M, ML, L, XL, SRAM GX Eagle, DUB, 30T alloy ring, Boost (52mm chainline), 175mm length
• Cassette SRAM Eagle XG-1275, 10-52, 12 speed
• Chain SRAM GX Eagle, 12 speed
• Brake Set SRAM G2 RS 4-piston hydraulic disc
• Brake Rotors 180/180
• Wheel Set Bontrager Line Elite 30, Tubeless Ready, 6-bolt, Boost110, 15mm thru axle
• Tires Front Bontrager XR4 Team Issue, Tubeless Ready, Inner Strength sidewalls, aramid bead, 120tpi, 29.x2.40''
• Tires Rear Bontrager XR4 Team Issue, Tubeless Ready, Inner Strength sidewalls, aramid bead, 120tpi, 29.x2.40
• Saddle Bontrager Arvada, austenite rails, 138mm width
• Seat Post Size: XS, S, Bontrager Line Elite, 100mm travel, MaxFlow, internal routing, 31.6mm, 340mm length; Size: XS, S, Bontrager Line Elite Dropper, 100mm travel, internal routing, 31.6mm, 340mm length; Size: M, ML, Bontrager Line Elite, 150mm travel, MaxFlow, in
• Stem Size: XS, S, Bontrager Line Pro, 35mm, Knock Block, Blendr compatible, 0 degree, 35mm length; Size: M, ML, L, XL, Bontrager Line Pro, 35mm, Knock Block, Blendr compatible, 0 degree, 45mm length
• Handle Bar Size: XS, S, Bontrager Line Pro, OCLV Carbon, 35mm, 15mm rise, 750mm width; Size: XS, S, M, ML, L, XL, Bontrager Line Pro, OCLV Carbon, 35mm, 27.5mm rise, 780mm width
• Handle Bar Width 780
• Head Set Knock Block Integrated, 58-degree radius, cartridge bearing, 1-1/8'' top, 1.5'' bottom

Sram GX Eagle Transmission review

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David Harrison

Table of contents, fuel exe 9.8 xt review (2023).

No longer are bike manufacturers only pushing to create e-MTBs with the largest batteries and most powerful motors – though, of course, there are still those bikes being made, too.

There are now new players in the market, like the super light-weight e-MTBs, which mimic the feel of normal MTBs, but still offer a little assistance when needed. Many bike brands are now pushing to create the lightest models, rather than the most powerful.

Trek, Specialized and Orbea are the front-runners in the pack looking to make this happen. Trek’s EXe range of bikes are among the best out there at the moment.

The Fuel EXe 9.8 XT is on the cheaper end of the spectrum in the Trek range, so is it a steal? Or should you go for one of the higher spec options? Or should you look to some of the other big players?

We’ve given it a thrashing on the trails, climbed the climbs and negotiated the descents, to give you all the answers. Without further ado, then, let’s really get to grips with the Fuel EXe 9.8 XT…

Our Verdict

It’s another round of applause for the crew at Trek.

The Fuel EXe 9.8 XT is a very well crafted e-MTB, which is set at a fair price for the amount of assets on offer. It’s lightweight and nimble on the trails, yet feels sturdy and well-planted at the same time.

It has the same motor and battery as featured on the much more expensive models in the Fuel EXe range, yet is a fraction of the price. It can climb, it can descend, it can twist and it can turn, and always feels comfortable.

There are few minor qualms, but overall we think the Trek Fuel 9.8 offers excellent value for money.

• Lightweight
• Natural power delivery
• Motor display
• Brakes (heat management)
• Battery size

Trek Fuel EXe 9.8 XT

Price: $8,699

Weight/frame.

The Fuel EXe 9.8 XT comes with a strong, fully-carbon, OCLV frame . It’s a sturdy beast, which can take a lot of punishment out on the trails. It looks a beauty, too, with internally-routed cabling giving an uncluttered and simplistic finish.

If you’re wondering how much does a Fuel EXe 9.8 XT weigh? The answer is the full bike, with a medium sized frame (which we rode during our reviews), only weighs in at 18.10kg . That’s decent, but by no means the lightest out there.

The bike handles very well, though, and you can tailor your setup to your body pretty well thanks to the differing frame sizes available and the range of geometry options. You can choose between 4 sizes of frame – small, medium, large and extra large – each of which has two different geometry setups.

It means that, for most riders, you end up with a comfortable position on the bike you end up going for.

ℹ️ It’s key to get the sizing right or you could find yourself losing out on the true capability of the bike’s handling, if you don’t.

The bike handles really well on super technical and twisty trails, you feel very much in charge of the bike and it dodges and weaves seamlessly.

Trek has partnered with the robotics and aviation tech firm TQ for their electrical components. The company is a new player in the market, but it’s certainly turned heads in this collaboration with Trek.

The Fuel EXe 9.8 XT has TQ’s 360Wh battery installed, which is the same size as the battery in the higher spec bikes in the Fuel EXe range.

ℹ️ This is a good time to remember why this bike exists in the first place – it isn’t meant to be a powerhouse, workhorse of an e-mountain bike. It’s meant to offer a bit of assistance, while remaining light-weight, playful and like a normal MTB. This battery achieves this.

It charges up in two hours and during our review rides we managed to get out around 35-40km of assistance , with plenty of climbing involved. That isn’t insignificant and it works well with the TQ motor (which we’ll come to soon) to release power conservatively.

The motor fitted on the Fuel EXe 9.8 XT is another reason to celebrate TQ. The company’s HPR50 , which can emit 50Nm , is a beautiful piece of kit and it operates near enough silently on the Trek Fuel 9.8.

ℹ️ This is another good time to remember that this type of e-mountain bike isn’t designed be immensely powerful, like some of the big beasts on the market. You would lose that manoeuvrability and lightness.

50Nm is by no means a measly amount of torque. That TQ motor does a seriously good job out on the trails. When you take into account bike’s lightness, it makes easy work of some tough climbs and the TQ technology delivers the power in a natural-feeling way.

It’s very easy to forget that you aren’t riding a normal MTB – you don’t encounter any over pulls from the motor and you feel in control. It won’t power on all day, but it offers a capable rider a decent leg up when they might need it.

Motor Display

It’s a big bravo to TQ and Trek here. The motor display is a truly excellent feature, which really needs to be credited.

It’s far from just a device which tells you how much battery you have left, although it certainly does that and with a precise percentage figure.

It also offers a full ride experience – complete with RPM information, elevation data, how many kilometres you can still use with the assistance on, along with many other awesome features.

Put simply, we flippin’ love it.

The bike comes with 3 modes to flick between – Eco, Mid and High – with the display offering prompts to make sure you utilise the right assist level at the right time, to get the most out of your battery.

The suspension setup on the Fuel EXe 9.8 XT is exactly the same as the slightly pricier Fuel EXe 9.8 GX AXS.

The 9.8 XT comes with RocksShox Lyrik Select+, Debon Air spring forks and RockShox Super Deluxe Select+ RT rear shocks . They offer 150mm travel at the front and 140mm at the rear .

It’s a setup which is ready for some enduro and XC thrashing, not crazy downhill riding. That’s not to say it can’t handle a bit of descending, but it feels very uncomfortable on the big hits – although, again, it wasn’t designed for that.

The suspension offers a decent level of comfort, particularly as it ducks and dives between techy twisty trails. It comes alive on back and forth single-tracks and has a very playful feel. With that light frame, it’s a pleasure to ride.

Wheels/Tyres

The Fuel EXe 9.8 XT has exactly the same tyre setup as the more expensive and higher spec models in the Fuel EXe range – 29in carbon, Bontranger Elite Line wheels . They’re a sturdy pair of feet to have out on the trail, and lightweight thanks to their carbon OCLV compound.

They also manage to soak up quite a lot of pressure, which is complemented by the Bontrager SE5 Team Issue tyres . The tyres offer a great level of cushioning and it’s another feature that makes you feel very comfortable out on the trail, alongside the sturdy frame, suspension setup and wheels.

However, the tyres aren’t as durable as we would like them. Although they offer a decent level of cushioning, they are prone to punctures and that’s a problem for us.

Now this is where the spec comes down a bit compared to other bikes in the Fuel EXe range. The 9.8 XT comes with Shimano XT M8120 4-piston hydraulic disc brakes .

There are elements to admire – they certainly have the stopping power you need, operating well at pace and when put into some hardcore cornering.

However, they do sound quite noisy at times, with a level of screeching which isn’t easy on the ear. The heat management isn’t ideal, either – they can get very hot, indeed.

This is where the XT gets its name. The bike comes with a Shimano XT M8100 , which we think is much of a muchness compared to the SRAM Eagle XG-1275, which is fitted on the more expensive Fuel EXe 9.8 GX AXS.

The XT M8100 offers smooth shifting and no grumbles at our end. It ticks the boxes we want, and whilst it’s a no-thrills setup, it does the job nicely.

We think this is quite an attractive price. The Fuel EXe 9.8 XT has many similar features to some of the more expensive bikes in the Fuel EXe range and it offers a lot in the electrics department, without adding heaps of extra weight.

Its very well-rounded e-MTB, which comes in significantly cheaper than some of the higher-spec bikes in the range. We would certainly consider dipping into our pockets at this fair price point.

Fuel EXe 9.8 XT Facts & Figures

Size configurations.

* All measurements provided in cm unless otherwise noted.

How Does it Compare?

A good place to start is to look at the other bikes in the Fuel EXe range

The highest-spec Fuel EXe 9.9 XX1 AXS comes in at $13,999; that’s over $5,000 more than the 9.8 XT. If you look closely, many of the features are exactly the same – particularly in terms of the electronics, wheels and frame.

So, realistically, what you’re paying $5,300 more for is a higher-spec drivetrain, brakes and a slightly better suspension. To us, that sounds like a lot. And more to the point, the higher spec 9.9 XX1 AXS actually weighs more than our bike in this review.

Unless you’re a very experienced rider, there aren’t many of us that really need to be heading up for the highest spec bike; in terms of ride experience, you won’t notice much difference and certainly not worth paying over $5,000 more for.

There are other manufacturers operating in this area, though.

Orbea are one of the big players, with their Rise series of bikes really nailing the market at the moment. A comparable bike, price wise, is the Rise M-Team 20MPH – at $9,449.

It comes with a 360Wh battery and a Shimano EP8-RS motor, which kicks out 60Nm of torque. The large-sized carbon framed bike has a full weight of 18.92kg, slightly more than the Fuel EXe 9.8 XT.

Both bikes have the same amount of travel in the suspension and similar Shimano XTR M9100 drivetrain setups. Overall, they’re both very similar bikes, both handle like a dream, are lightweight and offer a good amount of torque, without compensating too much on the overall weight.

It really is a toss up between them and it depends whether you want a little extra torque for a little extra weight. Ultimately, though, we would stick with the Fuel EXe 9.8 XT.

Final Thoughts

The Fuel EXe 9.8 XT is another example of excellent manufacturing by Trek. It’s another brilliant e-MTB, which bridges the gap between the worlds of the conventional MTB and fully juiced-up e-MTBs.

It’s lightweight, a dream to throw around the trails and still offers a decent amount of assistance. There isn’t much difference between this bike and the higher spec bikes in Trek’s Fuel EXe range and, quite frankly, we loved riding it.

It ticks a lot of enduro and XC boxes, offering brilliant cornering, nimble performance on the descents and light-footedness on the hills.

It would suit a capable rider, who wants a leg up at the most challenging of times; it wouldn’t suit a novice or they might feel like they’re not getting enough out of their e-MTB.

We loved it, though, and at $8,699, it’s a fair price for a highly-advanced piece of kit that’s beautiful to ride. Go out and give this puppy a spin.

“If you enjoyed this review then make sure to check out our reviews of other Trek e-MTBs, including the Fuel EXe 9.8 GX AXS , Fuel EXe 9.9 XTR , Fuel EXe 9.7 , and Fuel EXe 9.5 .”

Fuel EXe 9.8 GX AXS Review (2023)

Fuel EXe 9.9 XTR Review (2023)

Fuel EXe 9.7 Review (2023)

Fuel EXe 9.5 Review (2023)

+1 (918) 393 4169, [email protected].

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The Matchup: 2021 Trek Slash or Fuel EX? - All-Mountain Bike vs Trail Bike

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• Rider Notes

2020 Trek Fuel EX 9.8

A 27.5″ / 29″ carbon frame full suspension trail bike with high-end components. Compare the full range

For This Bike

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Based on frame geometry and build specs.

A bike with lower gearing will be easier to ride up steep hills, while a higher top end means it will pedal faster down hills.

Fuel EX 9.8

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June 2021 · Peter Walker

The Trek Fuel EX has proven itself as an excellent all-rounder in the past. This year, the American brand enters the race with the € 5,999 Trek Fuel EX 9.8 GX, which combines a high-end frame with a mid-level spec but still features Trek's Thru Shaft shock technology. So does it always have to be top-spec? How big is the difference in performance and how does the Fuel EX 9.8 GX fare against its more expensive peers?

Very comfortable uphill

Intuitive handling

High-quality frame with integrated storage compartment

Tires are very puncture prone and generate little traction

Brakes don't do the bike’s potential justice

Read Review

Oct 2020 · Benjamin Topf

The Trek Fuel EX 9.9 is an absolute classic in the trail bike segment. Could it also be the perfect bike for the next bikepacking adventure with its modern geometry and spare parts compartment in the down tube? We put the Fuel EX to the test.

Maximum fun on the descents

Intuitive and good-natured handling

Storage compartment in the down tube for tools or snacks

Too sluggish on easy terrain

Too much bike for long straights

Apr 2020 · Tom Marvin

A classic trail bike, with a fun and engaging ride built around a solid frame

A solid feeling frame backed up by a ride quality that encourages you to pop and play around

The long Shimano brake levers kill the feel, while the supple rear suspension shows up the budget fork

Jan 2020 · Jeremy Benson

Trek recently redesigned their popular Fuel EX mid-travel trail bikes for the 2020 model year. The updated geometry brings this bike in line with modern...

Supple rear suspension

Fun on a wide range of terrain

Moderately heavy

Short dropper post

Frame sizing runs a little small

Nov 2019 · Alan Muldoon

The updated Trek Fuel EX now features storage in the downtube, 29er wheels, more travel and a gorgeous frame… oh and it’s rollicking fast too.

Punchy trail bike with great handling.

Low profile tyre tread lacks bite.

Having spent a load of saddle time with the 2020 Trek Fuel EX 9.8 on home soil, we've been getting very familiar with this 130mm travel trail brawler. It hasn't all been smooth sailing though. Read on to see what the Fuel EX does well, what it's struggled with, and what changes we've made to our long term review rig.

Stupendously plush rear suspension

The Fox 36 has really stepped up the EX's appetite for gnar

New geometry brings masses of high-speed stability

Rattling from the downtube trapdoor

Knock Block system works but creates practical annoyances

The 35mm carbon bars are overly stiff

Aug 2019 · Mike Levy

Trek's trail bike gets an all-new frame with tweaked suspension and fresh geometry, but where does sit compared to the competition?

Forgiving, deep feeling suspension

It's a wizard on technical climbs

New geometry increases capabilities

It might be too forgiving for some riders

You'll be using the pedal assist lever often

Trek could have gone further with the geometry

Apr 2019 · Rob Mitchell

We've been testing two 2019 130mm travel 29er trail bikes; the GT Sensor Expert and the Trek Fuel EX 9.7. Here we review the Trek Fuel EX.

Last updated 16 April Not listed for 1,093 days

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Trek Remedy 9.8 vs. Trek Fuel EX 9.8?

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Hi all first post here. Here's my story and my situation and would love guidance from the experts. I'm 47 and in the last 6 months have gotten very serious about my health. I lost 27 lbs and after a very long absence from cycling, started riding again. I picked up a carbon fitness bike and was immediately hooked and started riding. I stopped riding in my late 20's when back pain from a BMX accident that affected my L5 vertebra made it difficult. When I started riding again, I found that I could ride for long distances so long as I had a reasonably upright position. After riding for the past 6 months, I started feeling strong enough in my core and good enough on long rides that I wanted to add mountain biking back into my repertoire. I realize that I will never do crazy downhill descents or big jumps as my back, while stable now, could easily be injured again. With that in mind, I narrowed my focus to a XC carbon FSB. My choices narrowed down to 3 bikes: Specialized Camber Carbon 29 Trek Fuel EX 9.8 29 Trek Remedy 9.8 29 I demo rode the Specialized and while a great bike, I wasn't in love with it. I demo'd the Fuel EX 9.8 today and liked the feel of it better but wasn't quite upright enough. While I know this can be fixed with an adjustable stem, I'd prefer to find a bike that's a better fit before modding. With that, i refocused today on the Remedy which has a shorter Top Tube length. When I did a short ride before, I found it the best of all positions for me. Based on all the info above, does the Remedy seem the best "fit" for my needs? PS: The local dealers are offering huge discounts on both the Fuel and Remedy making them even more attractive. I do know it's because the Plus models are coming. Thanks  

Generally, none of those would normally be considered XC, but rather trail bikes, though I do know a few who very happily XC race Fuel EXs . XC are usually 100mm travel, have a longer and lower rider position, and are quicker steering. The Trek Top Fuel and Specialized Epic are examples. The Remedy is taller and slacker and the Fuel EX falls in between. Normally, choosing between the EX and the Remedy would be based on the type of terrain and riding you intend to do. Assuming you're of average proportions you should be able to get the fit you need on either with appropriate selection of frame size, components, and adjustment. More info about you, your height and weight for example, and the type of riding you intend to do would be helpful.  

I have very poor flexibility, strong, but not flexible. I'm also much more comfortable in a more upright position. I demo'd a Niner RKT (xc race bike) and while I loved how it pedaled, I was not in love with how low the cockpit was. On my Santa Cruz Tallboy 2 (cross between xc and trail bike) I've added a carbon bar with a 20mm rise and that's made the bike fit me better. It's now very comfortable. I guess my point is that you may have to change a component or two to really refine the bike to your personal specs. Most bike shops will swap parts off a new bike and you just simply pay the difference.  

You have some specific needs. What Hollis says is the way you should go. A riser bar and short stem combined with a zero offset seatpost should make almost any bike meet your posture requirements. And once you're comfortable making those fit adjustments a lighter XC fs bike will be more fun because of the lower weight. With a Boost 148/110 Top Fuel you can add more compliance with some wider rims and Plus tires while still keeping the weight down. A test ride can easily include asking the shop to swap the stem. It's takes them a couple minutes.  

Definitely sounds like the Fuel EX would be a good choice. I love mine for how it soaks up the rough terrain around here and still excels at climbing the steep hills we have, and it has enough travel for the descending I'm doing. FWIW, I'm 5'9", average proportions and ride a 18.5.  

Doesn't the Camber Carbon have the longest stack height of the 3? Also seems to have the shortest reach. That should put you in a more upright position but it depends on what stem and bars it came with. 120mm trail bike should suffice though. And while 100mm travel of an XC might even be enough the XC geo is more stretched out which you don't seem to want.  

The Camber is similar in top tube length to the Fuel but felt strangely longer. Quick follow up: I rode both a 19.5 and 18.5" Fuel EX this weekend. I'm sure with riser bars and stem the 19.5 bike would be pretty close to ideal. On the other hand, th 18.5" bike already feels shorter (which it is by almost 1" from seat to stem). The thing that concerns me is that all sizing info says that the proper bike for me is a 19.5". Given short legs (30" inseam) is it reasonable to think an 18.5" bike is better for my situation?  

ChrisFu said: The Camber is similar in top tube length to the Fuel but felt strangely longer. Quick follow up: I rode both a 19.5 and 18.5" Fuel EX this weekend. I'm sure with riser bars and stem the 19.5 bike would be pretty close to ideal. On the other hand, th 18.5" bike already feels shorter (which it is by almost 1" from seat to stem). The thing that concerns me is that all sizing info says that the proper bike for me is a 19.5". Given short legs (30" inseam) is it reasonable to think an 18.5" bike is better for my situation? Click to expand...

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Is Trek Fuel EX 9.8 GX Worth Buying? [Trek Fuel EX 9.8 GX Review]

Table of Contents

Trek Fuel EX 9.8 GX Gen 5

• Frame: Carbon
• Suspension: 140mm (front), 130mm (rear)
• Tires: 27.5/29 inches

What we like about it: Sturdy frame supports professional riding tests.

What we don’t like about it: High-spec components make maintenance more careful.

Rating: (4.8/5)

The Trek Fuel EX 9.8 GX is the perfect full-suspension trail bike. When you see the actual car you know I’m definitely not exaggerating.

Whether it’s a full carbon brazed body, 140mm (front) 130mm (rear) suspension travel with both shock absorption and climbing performance, or the superior performance of the SRAM G2 RS 4-piston hydraulic disc 9.8 Amaze you. This is a real Trek Fuel.

When you ride this trail bike, the innovative front and rear triangular geometry frame and tall Bontrager Line Elite 30 tubeless tires let you take any rough terrain you want to risk or dangerous terrain you don’t dare to challenge.

Don’t be afraid of any drag, I’m sure the Trek Fuel EX 9.8 GX Gen 5will blow your mind. Below we break down the Fuel EX 9.8 GX’s descending and climbing capabilities, key features, components, and specs in detail along with the rest of the range.

If you want to know more about Trek fuel versions, check out our review.

Learn more: Trek Fuel EX 9 Review

Trek Fuel EX 5 Review

It would be unconvincing if I just told you how perfect the Trek Fuel EX 9.8 GX’s superior performance is, so in this review, the Trek Fuel EX 9.8 GX joined us on a professional trail. From the slick ascents of rough, year-round training to the dangerous downhills of sharp rubble and fallen branches, the Trek Fuel EX 9.8 GX Gen 5 is officially tested.

In the beginning, based on the emphasis on the woodland, I adjusted the shape of the car to a high-geometry climbing shape, and I was completely ready for a big fight.

During the rapid acceleration, I tightened my muscles and started to go all out, and the process was not as easy as I thought. The 1×12 drivetrain gave me the most bang for my buck, while the grippy, grippy tires kept me from skidding during fast rides.

The tires are full of aramid beads. Although it is an unremarkable design, it is also a great help in increasing friction. The all-carbon brazed body includes rims and front fork components to maximize shock absorption.

The Trek Fuel EX 9.8 GX weighs in at 13.1kg, which is about as heavy as a sleeping bulldog in my living room. I can lift it easily.

This is a section of trail terrain that is not so straight, and collisions with the body during sharp turns are a concern for most drivers. Although the performance of carbon brazing is balanced, it also means that it is more brittle and prone to damage.

I have to admit that the Trek Fuel EX 9.8 GX has achieved the ultimate in design details. There are also models without bumpers in the same price range. In my opinion, this is essential for riding.

When I reached the highest altitude, our conquest of climbing had come to an end, and the next step was the more exciting rapid descent and dive test. When I looked at the broken and sharp rubble on the forest road, my heart was nervous.

I’ve been involved in riding for years, but in the face of this uncertain and dangerous terrain, I’m still full of energy and prepared for the worst. In the control of the body during big bumps, whether the car itself can withstand the constant ups and downs of stimulation…

These are all things I have to consider. I double-checked the springs, dampers, brakes, and when I was ready, I took a deep breath and started sprinting.

During the rapid descent, it was indeed very thrilling. The countless gravel bumped my body and shook my arm muscles, but it was much lighter than I thought.

I think this is because the carbon fiber material of the body absorbs vibration and the cooperation of the front and rear triangles, through the compression and extension swing of the shock absorber, to reduce the vibration effect. Even in bumpy and rough road conditions, the tires remain firmly on the ground to maintain optimum pedaling efficiency and ground contact performance.

I still have good control over the Trek Fuel EX 9.8 GX.

Main Feature

When you get your hands on this car, you’ll be amazed at the unique quality of the Trek Fuel EX 9.8 GX itself. Glossy carbon braided body, I’m really obsessed with this material.

But it has to be said that for beginners, this material may have higher professional requirements for you. It is so light and so strong, the two seem to be contradictory, but they can be well integrated.

The cooperation of the front and rear triangles can maximize its absorption and shock absorption effect. There are also many choices in color design (Lithium Grey / Factory Orange; Matte Carbon Smoke; Satin Black Olive; Raw Carbon / Rage Red).

The variety of colors is really rare for Trek. Anyone who knows me will know that I have always complained about the single-color Trek.

It is still a noble internal wiring design, and I appreciate the internal wiring very much. It can best protect the performance of the important lines of the body, and in very harsh environments, it is still not damaged by mud.

You must know that we often encounter rainy days, and we have no choice but to sprint the entire track in the face of roads full of mud. Internal wiring does save a lot of trouble for our follow-up maintenance. I’d rather drink a full case of beer with the drivers at the end of a race than spend a lot of time tending my car.

In terms of details, I appreciate Trek Fuel EX, whether it is the storage function of the body and the design of the increased shock block. It is very necessary to carry the necessary food to supplement physical strength when riding at high speed.

The classic 75.0-degree seat tube angle makes you more comfortable in your sitting position. Because of years of riding, I have tried many models. If you feel uncomfortable in the position, it will cause a lot of damage to the muscles, and you will feel uncomfortable after a riding competition.

With a 66.0-degree head tube angle, there is nothing to fault in terms of riding experience. Of course, if your upper body is too long, then you have to check the size chart and choose carefully to avoid exchange. (for reference I’m 5’8″, choose size M)

The Fox Performance 36 front and rear travel combination (140mm (front) and 130mm (rear)) made it easy for me to climb and descend, which greatly reduced the impact force on the body. You can master more in body control, and adjust your state at any time according to the terrain.

In terms of braking power, as I mentioned earlier, the SRAM GX Eagle’s 1×12 dynamic braking system can provide me with great assistance during the ride. My riding experience with the Trek Fuel EX 9.8 GX can give a standard A rating.

Components and Specifications

Sram gx eagle 1×12 drivetrain.

As I have always emphasized, I am obsessed with trail riding, not only because of the unknown risks, but also because of the thrill of approaching the limit in speed challenges.

Whether it’s breaking resistance uphill, it can also give you a lot of confidence on rougher roads, thanks to the SRAM GX Eagle 1×12 drivetrain.

I still remember my race in Southern California, and even though the riders I was with were very capable, the SRAM GX Eagle 1×12’s range of 22-speed options gave me a lot of confidence.

Float EVOL Air Spring

For the Trek Fuel EX 9.8 GX, weight has always been its strength. In the design of reducing the weight of the body, the load EVOL air spring has achieved a high level in its ability to absorb vibration and reduce the body being squeezed.

I think the designers at Trek must have put a lot of thought into it. At this point, I feel compelled to point it out to my readers.

SRAM G2 RS 4 Brake Hydraulic Disc

The SRAM G2 RS 4 brake hydraulic disc itself is a statement of technology, a new trend over traditional mechanical discs. If you know bicycle accessories, you should know that we have gone through a big leap from mechanical discs to hydraulic discs.

This kind of leap can be explained from two aspects. First, the hydraulic disc is more sensitive to emergencies, and second, the load also greatly reduces the burden on the body, so that you can make a big leap in high-speed driving. best level.

But there is one regret that I still need to share for the sake of honesty. The maintenance cost of the hydraulic disc is higher than that of the mechanical disc, and the maintenance is more careful than the mechanical disc, so it is also expensive.

Other Versions of Trek Fuel EX

Trek fuel ex 9.9 x01 axs.

Compared to the Trek Fuel EX 9.9 X01 AXS, we were surprised to find the Trek Fuel EX 9.8 GX’s price/performance ratio was outstanding. Although the Trek Fuel EX 9.9 X01 AXS and 9.8 GX share the same full carbon fiber material, they also have the same liquid discs on the brakes and even the fork selection.

But the Trek Fuel EX 9.8 GX is about $4,000 more expensive. Although it is lighter in body weight (Trek Fuel EX 9.8 GX weighs 12,8kg), that doesn’t quite convince me.

In terms of suspension travel, the Trek Fuel EX 9.9 X01 AXS has not been upgraded, and it is still the front (140mm) and rear (130mm) travel design, which means it is faster and more stable when climbing and descending.

So in general, on the more important performance components, the Trek Fuel EX 9.9 X01 AXS has not achieved a complete leap.

Trek Fuel EX 8

When compared with the Trek Fuel EX 8, it was found that the Trek Fuel EX 9.8 GX achieved a relatively large improvement, although the price also increased accordingly. However, by comparing the data, we found that the following important components have been upgraded.

First up is the fork, from the Trek Fuel EX 8’s Fox Rhythm Float 34 to the Fox Performance Float 36, which means a breakthrough in both shock and weight. Second, the Fuel EX 9.8 GX is lighter, which makes it easier on some uphills and jumps.

Compared to the Trek Fuel EX 9.8 GX’s higher version of the SRAM G2 RS hydraulic disc, the Trek Fuel EX 8 features a Shimano 4 hydraulic disc, which is far less sensitive and lighter than the Trek Fuel EX 9.8 GX. So if you’re looking for a more durable and performant full-suspension bike, I’d go for the Trek Fuel EX 9.8 GX.

In terms of riding and performance, each upgrade means a completely different riding experience and stable handling performance, and it can also save a lot of trouble in subsequent upgrades.

Learn More: Rider’s Favorite – Trek Fuel EX 8 Full-Shock Mountain Bike Review

What do we like about it?

• Full carbon fiber body material to meet the needs of lighter and stronger riding.
• The innovative geometric frame can maximize the force of absorbing shock.
• 1×12 drivetrain accelerates more efficiently and offers a wide range of speed options.
• Brake hydraulic disc for more braking agility, while minimizing vehicle weight.
• The built-in wiring is simple and efficient, saving time and cost of maintenance.
• More color choices to meet the needs of different groups of people.
• Different suspension travel front and rear is very stable and friendly for climbing and descending terrain.
• Tubeless tires can help riders ride more stable and confidently.
• The air spring can accommodate the impulse from the body extrusion to the greatest extent.

What do we not like about it?

• Not very wallet-friendly.
• Tall components that require careful maintenance to avoid major damage.
• What is the body weight of the Trek Fuel EX 9.8 GX?

The M model of the Trek Fuel EX 9.8 GX is 13.1 kg.

• What is the front and rear suspension travel of the Trek Fuel EX 9.8 GX?

The Trek Fuel EX 9.8 GX has 140mm of front and 130mm of rear suspension travel, respectively.

• What is the Trek Fuel EX 9.8 GX drivetrain?

The Trek Fuel EX 9.8 GX drivetrain is a SRAM GX Eagle 1×12 drivetrain.

Accessories

Comparison Table

Ibis ripley gx vs trek fuel ex 9.8 gx.

In terms of body weight, the Ibis Ripley GX reaches 2.3 kg, which is a big drag for the body to climb. Secondly, we all know that we will encounter some big jumps because of the high speed when riding on the trail, so it is necessary to ride a lighter bike.

In terms of fork performance, the Trek Fuel EX 9.8 GX Fox Performance Float 36 fork is more professional, and is superior to the Ibis Ripley GX’s Fox Factory Float 34 in terms of shock absorption and stiffness.

So, if you’re looking for superior performance and don’t want the necessary expense of some fork upgrades, I think the Trek Fuel EX 9.8 GX is a better choice.

BMC Fourstroke 01 vs Trek Fuel EX 9.8 GX

When it comes to choosing a professional trail, I believe the BMC Fourstroke 01 is definitely in your choice. First of all, in a strict sense, the frame weight of the BMC Fourstroke 01, LT | TWO is greater than that of the Trek Fuel EX 9.8 GX.

Thanks to Trek’s traditional hand-crafted carbon fiber bodywork process, Trek has achieved the maximum weight in terms of body weight. Secondly, in terms of price, Trek Fuel EX 9.8 GX is more economical and has made concessions in price.

The Trek Fuel EX 9.8 GX has also been upgraded with a more professional Fox Performance Float 36 fork in my preferred fork choice. Anyone who knows me will know that I like the Trek Fuel EX 9.8 GX’s Bontrager tires very well.

Compared to the DT SWISS tires used on the BMC Fourstroke 01, the Bontrager rims are thicker and the wheels are thicker. Smoother, stronger, and less likely to blow out, so we felt the Trek Fuel EX 9.8 GX was smoother when we rode it.

learn more: BMC Fourstroke 01 LT TWO Review – The Ultimate Enjoyment For Your Mountain Riding

Revel Rascal – GX Eagle vs Trek Fuel EX 9.8 GX

As a consumer, when you see the price of the Revel Rascal – GX Eagle, you will definitely be a little excited because it is more affordable. Comparing the details of the two, in the material of the rim, in order to reduce the cost, the Revel Rascal – GX Eagle uses the Industry Nine Enduro S 1/1 29″ alloy Wheelset, although it is marked (*upgrade available).

Compared to the carbon fiber material of the Trek Fuel EX 9.8 GX, the carbon fiber material absorbs more force when it is subjected to larger impacts, which means that the rider is more able to control the fast bike. Design-wise, if you’ve got the actual two bikes and felt them, you should be able to understand why I prefer the design of the Trek Fuel EX 9.8 GX because of the placement and angle of the shocks.

I think Trek Fuel EX 9.8 GX The EX 9.8 GX can more efficiently cooperate with the body to expand and contract, so as to maximize the absorption of vibrations and reduce the bumps of the body. On the professional track, it is more friendly to ride on the ground and roll quickly.

Learn more: Best Mountain Bikes Under $2000

Giant Trance X Advanced E+ 2 vs Trek Fuel EX 9.8 GX

The Giant Trance X Advanced E+ 2 is all about high performance, and certainly at a high price. Comparing the various data of Trek Fuel EX 9.8 GX, Giant has made some upgrades.

It can be seen that the travel of the suspension is 140mm in the front and 140mm in the rear. The Giant Trance X Advanced E+ 2 has some electric upgrades, such as a Yamaha 250W 85Nm mid-drive motor.

However, for some traditional riders, this is an optional feature. Of course, this kind of innovation and upgrading is also a major trend. Like I said, if you want a traditional ride and you’re not that comfortable with hybrids, I think you can wait until electric hybrids are more mature and try out this expensive model.

In case, the above comments are helpful to you, please remember to share the subscription. Have a great day!

Learn more: Is Giant Trance X Advanced Pro 29 3 Worth Buying? [Giant Trance X Advanced Pro 29 3 review]

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Trek Fuel EX 9.8 29

• AUS $ NZD $ USD $ CAD $ GBP £ EUR €

Colour / Powder Blue

Size / 15.5, 17.5, 18.5, 19.5, 21.5, 23"

At a glance

Where to buy.

Specifications

• Frame OCLV Mountain Carbon main frame & seatstay, alloy chainstay, ABP, Boost148, Full Floater, EVO link, E2 tapered head tube, Mino Link, Micro Truss, Control Freak internal routing, Carbon Armor, PF92, ISCG 05, G2 Geometry, 120mm travel
• Wheels DT Swiss M1900, tubeless strips & valves, Boost110 front, Boost148 rear
• Wheel Size 29"
• Tires Bontrager XR3 Team Issue, Tubeless Ready, 120tpi, aramid bead, 29x2.30"
• Crank Shimano Deore XT, 36/26
• Front Derailleur Shimano Deore XT, high direct mount
• Rear Derailleur Shimano Deore XT, Shadow Plus
• Shifters Shimano Deore XT, 11 speed
• Brakeset Shimano Deore XT hydraulic disc
• Handlebar Bontrager Rhythm Pro, OCLV Carbon, 31.8mm, 15mm rise
• Saddle Bontrager Evoke 3, hollow titanium rails
• Seatpost RockShox Reverb Stealth, 2-bolt head, 31.6mm, zero offset
• Stem Bontrager Rhythm Pro, 31.8mm, 0 degree
• Headset FSA IS-2 carbon, E2, sealed alloy cartridge

Q: What size wheels does the 2016 Trek Fuel EX 9.8 29 have?

The 2016 Trek Fuel EX 9.8 29 has 29" wheels.

Q: What size 2016 Trek Fuel EX 9.8 29 should I get?

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• Fuel EX 9.8 XT

Trek Fuel EX Vs Top Fuel Mountain Bike ?

Trek mountain bikes are built for the trails, and no bikes illustrate that better than the Trek Fuel EX and Trek Top Fuel. So, it’s understandable to pit Trek Fuel EX vs Top Fuel, which compels us to ask, what’s the difference?

Trek Fuel EX is a full suspension 29er trail bike with a 140mm front suspension and a 130mm rear suspension, while Trek Top Fuel is a 29er or 27.5-inch full-suspension cross-country bike with a 120mm front and rear suspension.

So, you can distinguish the trail bikes according to the type, suspension travel, and wheel size. Other differences are with respect to the geometry, suspension technology, project one customization, speed, weight, and even price.

Below is a table breakdown of all the nine differences between Fuel EX and Top Fuel to be explored in detail later:

This article will not just discuss the differences between the two Trek MTBs but will also highlight their similarities. Without saying much, let’s begin with the bikes’ overview.

Trek Fuel EX Overview

Trek Fuel EX is a full suspension trail mountain bike by Trek designed to take on just about any trail all season long.

This mountain bike comes with a balanced trail geometry that brings out the perfect balance between speed and control. As a result, it’s easier to handle on tricky trails and promises a fast pace.   

Fuel EX is available in 29-inch (29er) and 27.5-inch wheel sizes to accommodate all heights. Women who naturally have a shorter stature can set for 27.5-inch options, while men who are inherently taller can go for 29ers.

Suspension-wise, Fuel EX features a 140mm front suspension and a 130mm rear suspension, which is enough to hit just about any trail and enjoy the same comfort and bump-cushioning.

In terms of suspension technologies, the manufacturer employs Mono Link to self-adjust the bike frame, Re: Aktiv to offer you more control, and Active Braking Pivot for more confident braking.   

The most notable miss is the Project One customization option. But we’ve several models to choose from, such as Fuel EX 5 Deore, Fuel EX 9.1XOR, Fuel EX7, Fuel EX 8, Fuel EX9.7, Fuel EX 9.8 GX/XT/GX AXS, Fuel EX9.9 XTR, and Fuel EX 9.9X01 AXS.

Overall, Trek Fuel EX is perfect for anyone who wants a versatile do-it-all mountain bike.

Trek Top Fuel Overview

Trek Top Fuel is a short travel 29er cross country mountain bike designed for cross country racing and fun trail riding.

This bike is more forgiving and impulsive on aggressive descents than regular XC bikes but has a snappier feel than a traditional trail bike. So, it gives you the best sense of both worlds.

It has a 120mm front suspension and 120mm rear suspension to have a more comfortable and confident ride. And since it’s a 29er, obstacle rolling is much funnier. The full-suspension XC bike enjoys a progressive geometry, which is more relaxed and offers you more control.

Suspension-wise, this XC bike employs Mono Link Technology and ABP, just like Fuel EX to promise self-adjustment geometry and confident braking.

But unlike Fuel EX, Top Fuel lacks Re: Aktiv suspension technology. Instead, it employs Anti-Squad technology, a suspension resistance technology that offers you more acceleration with every pedaling. That’s practically why this bike is a better cross-country racing bike.

The best bit is that Top Fuel is customizable through Project One. But still, the bike family is split into several models – which include Top Fuel 5 Deore, Top Fuel 7 Deore/XT, Top Fuel 9.7 SLX/XT, Top Fuel 8, Top Fuel 9.8 GX/AX SXS/XT, and Top Fuel 9.9X01/XTR/XX1 AXS.

Trek Fuel EX Vs Top Fuel Side-By-Side Comparison!

Now, here is how Fuel EX and Top Fuel compare:

1. Bike Type

Fuel EX is generally a trail mountain bike that can take on just about any trail every day – from dirt trails to rough off-roads and forest trails.

On the other hand, Top Fuel is a cross-country mountain bike that you can use for any cross-country event. Whether you want to compete at a local event or race casually in the countryside, you cannot go wrong with Top Fuel.

2. Suspension Travel

Fuel EX is a do-it-all mountain bike mainly because of its long travel range. The bike features 140mmm of front suspension and 130mm of rear suspension, enough to take on all terrains.

The suspension allows you to ride downslope and go over rocks. That’s how powerful the MTB is. Top Fuel promises 120mm suspension travel on the front and rear side, shorter than what you get from Fuel EX but enough for cross-country biking.

You want your cross-country race bike to feel lightweight and offer you better control, and that’s what you get from the 120mm travel range.

3. Trek Fuel EX Vs Trek Top Fuel Wheel Size

Top Fuel is a 29-er (29-inch mountain bike), while Fuel EX offers 29-inch and 27.5-inch wheel options. The difference is that 29ers mostly favor taller guys while 27.5-inch accommodate both taller and shorter guys.

So, you are more likely to get a matching fit with Fuel EX than Top Fuel. However, the advantage of Top Fuel is that you can have a custom-made bike matching your body size.

4. Geometry

These two Trek mountain bike families differ in their geometry, which affects their overall feel.

Fuel EX, for example, has a balanced trail geometry, which bridges the gap between the fast-handling short-trail geometry and the slow-handling greater-trail geometry.

As a result, the bike is easier to handle at high-speed and, pretty stable, and offers you more control. You cannot ask for anything better than a balanced trail geometry.

On the other hand, Top Fuel has a progressive geometry characterized by a longer wheelbase, thus more relaxed and promising more control.

5. Trek Top Fuel Vs Fuel EX Suspension Technology

Both Trek MTBs employ Active Braking Pivot (ABP) and Mono Link suspension technologies. ABP generally tunes the bike suspension to the braking and acceleration to enable you to brake more confidently and boss the trail.

Mono Link in opposite allows you to adjust the bike’s geometry quickly and on the go. The difference is that Fuel EX employs Re: Aktiv suspension technology while Top Fuel uses Anti-Squat suspension technology.

Re: Aktiv offers Fuel EX more grip, control, and a responsive feel, while Anti-Squat suspension allows you to go faster with every step. The more you pedal a Top Fuel, the faster it accelerates.

6. Trek Ex Vs Top Fuel Project One

Project One is Trek bike’s customization project. While Project One is available for top high-end Top Fuel models, it’s not available for Fuel EX. So, if you want a custom-made MTB for competition, Top Fuel is the way to go. 

That, however, doesn’t make Fuel EX an inferior family. No! There are so many high-end Fuel EX models to choose from, and they all come in all frame sizes, which means you can easily find your fit.

7. Bike Weight

There is at least a 2-4-pound difference between Fuel EX and Top Fuel of the same generation and size. For example, while Fuel EX 9.9 X01 AXS weighs 28.15 pounds, Top Fuel 9.9 XXL weighs 26.13 pounds.

That makes Top Fuel lighter than Fuel EX, and it’s understandable, given that Top Fuel is a cross-country racer while Fuel EX is a trail bike.

8. Top Speed

Being the lighter of the two and employing Anti-Squat technology makes Top Fuel faster than Fuel EX. That hugely explains why Top Fuel is a cross-country bike as it’s speedy, thus suitable got cross county.

Though you can race with a Fuel EX since it’s an all-terrain trail bike, you cannot go as fast as someone riding an XC bike, which is Top Fuel.

9. Bike Price

Trek Top Fuel costs more than Fuel EX because of the lower weight advantage, anti-squat technology, and Project One customization availability.

Trek Fuel EX Vs Top Fuel Similarities

After looking at the things that set Fuel EX and Top Fuel apart, here are some things that the two Trek MTBs have in common.

Suspension Technologies – Both bikes employ Active Braking Pivot (ABP) and Mono Link suspension. ABP promotes confident braking while Mino Link encourages geometry adjustment on the go.

Frame – Both families employ alpha aluminum on their mid-range bikes and OCLV carbon on high-end options.

Sizes – Both bike families come in all frame sizes as follows:

• Extra small (rider’s height: 137-155cm)
• Small (rider’s height: 153-166.5cm)
• Medium (rider’s height: 161-172cm)
• Medium/Large (rider’s height – 165.5- 179cm)
• Large (rider’s height: 177-188cm)
• Extra Large (rider’s Height – 186-196cm

Weight Limit – These two bike families limit their load capacities to 300 pounds. So, they are equally strong and perfect for heavyweight guys.

People Also Ask

1. what is the difference between trek top fuel and fuel ex.

The difference between Trek Top Fuel and Fuel EX is that the latter is a 29-inch trail bike while the former is a 29/27.5-inch cross country bike.

2. Is The Trek Fuel EX A Trial Bike?

Yes, Trek Fuel EX is a trail bike. It is a full-suspension trail bike with 140mm front suspension and 130mm rear suspension.

3. How Much Travel Does the Trek Fuel EX Have?

Trek Fuel EX comes with a 140mm front suspension and 130mmm rear suspension. The suspension offers optimum bump absorption and stability to take on just about any trail.

Closing Thought on Trek Fuel EX Vs Top Fuel:

Generally, Trek Fuel EX is an all-terrain trail bike with a 140mm front suspension and 130mm rear suspension. On the other hand, Trek Top Fuel is a cross country racing 29er with a 120mm front and rear suspension.

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