CRANKWORX INNSBRUCK COURSE DESIGNER TELLS ALL

HAMMERHEAD RELEASES NEW KAROO CYCLING COMPUTER

FIRST LOOK: MARIN’S ALL-NEW ALPINE TRAIL LINEUP

MOTION INSTRUMENTS LAUNCHES SYSTEM 2 SUSPENSION DATA ACQUISITION

  • AMERICANS DOMINATE PAN AMERICAN GAMES XCC RACES
  • USA WINS TEAM RELAY RACE AT THE PAN AMERICAN GAMES
  • VIDEO: CHASING TRAIL EPISODE 38 – IN SEEK OF SQUAMISH, BC’S UNRIDDEN MOUNT HABRICH TRAILS
  • TREK SLASH GEN 6 REVIEW – A GENERATIONALLY DEFINED TWO-WHEELED ENDURO MARVEL
  • U23 XCO RESULTS FROM THE PAN AMERICAN GAMES
  • INTERVIEW WITH THE (WARRANTY) VAMPIRE – THE COLD HARD TRUTH ABOUT BICYCLE WARRANTIES

Mountain Bike Action Magazine

Bike Test: Trek Session 9.9 29

trek session 9.9 test

Downhill is one of the gnarliest forms of mountain biking, requiring rigs that look more like off-road motorcycles than traditional bicycles; however, unlike its motorized cousins, a downhill bike requires gravity to propel it down the mountain. These bikes are some of the hardest to justify buying, unless of course you live in close proximity to a ski resort or have a good group of friends willing to take turns being the shuttle driver.

For that reason, MBA doesn’t test many downhill bikes; however, the new wave of 29er downhill bikes had many of our test riders curious to know what it would be like to ride a 7.5-inch-travel rig with fast-rolling 29-inch wheels. So, we decided to test one. We are stoked to introduce you to one of the winningest bikes on the World Cup Downhill circuit—the Trek Session 9.9 29.

WHO IS IT MADE FOR?

The Session has been in Trek’s lineup for years now and has featured many wheel sizes along the way, starting with the 26-inch wheel and later moving towards the 27.5-inch model, which is still available today. The 29er version was only offered as a frame, fork and shock package until the 2019 model year when Trek unveiled the bike we have here today. The Session 9.9 is Trek’s top-of-the-line 29er downhill race bike. So, who is it made for? Well, World Cup downhill racers; however, we’re sure Trek also expects to sell these high-octane bicycles to more human-like riders such as ourselves.

The Session 9.9 29 is designed for riders looking for an edge in competition or the ability to transform black-diamond trails into blue ones.

WHAT IS IT MADE FROM?

Trek designed the Session around many of its flagship technologies that we’ve come to know and love, such as OCLV (Optimum Compaction Low Void) Mountain carbon. OCLV is a process used across Trek’s carbon mountain bike lineup to ensure the right balance of stiffness, strength and durability. A Mino Link Flip Chip, along with fixed-angle headset cups, allows riders to fine-tune the Session’s geometry to better match different riding styles and types of terrain. The bike uses a four-bar suspension design with 190mm of travel, along with Trek’s patented ABP (Active Braking Pivot) to better separate suspension and braking forces. Trek then added armor to protect vulnerable areas, such as the downtube.

WHICH COMPONENTS STAND OUT?

The Session 9.9 is a purebred race bike equipped with nothing but the best. Starting with its suspension, we see a 190mm-travel Fox Factory 49 fork, which builds off the popular Fox 40; however, the arch is modified to allow clearance for a taller wheel. In back, Trek spec’d a 2019 Fox Factory Float X2 with a new mechanical bottom-out bumper to provide a more progressive end stroke. Our Session rolls on Bontrager Line 30 downhill wheels, with a Boost 110×20 hub up front and a Boost 157×12 hub with a seven-speed downhill freehub in the rear. Trek added a burly MRP G4 carbon chainguide and gave the bike a full Shimano Saint groupset. Bontrager parts round out the rest of the build, including the cockpit, saddle, seatpost and tires.

trek session 9.9 test

HOW DOES IT PERFORM?

Setting sag: Trek spec’d the Session with Fox Factory-level suspension, which we opted to set up with 30-percent sag front and rear. We then made adjustments to our compression and rebound until we found our sweet spot. The Session’s rear air shock made it easy to set sag without having to worry about swapping a coil spring. This means riders of all sizes can tune the suspension to their liking without purchasing extra parts.

Moving out: Once you toss a leg over the Session, it immediately becomes apparent that this is a purebred race machine built to take on the world’s toughest World Cup tracks. The big wheels, slack angles and wide 820mm handlebars all come together to inspire confidence—no matter what obstacles are in front of this beast. Prior to our testing, we trimmed the seatpost down 3 inches in order to have a lower center of gravity over the bike. Racers often run a taller saddle height than park riders; however, even for racing, the stock seatpost seemed a bit too high.

Overall, the Session has a comfortable fit, and while the reach measurement looks short on paper, standing over the bike feels natural.

Cornering: Our test riders expected the Session 29 would be like a monster truck made to straight-line its way down the mountain, and while that was somewhat true, this big-wheeled downhill machine surprised us. While the Session isn’t a slasher-type bike that lets you smash the rear wheel into corners, it does track through turns impressively well and changes direction with relative ease. Of course, a little extra speed helps liven this bike up, but even in slower situations the Session navigated the trails quite well.

trek session 9.9 test

Descending: “Faster than a speeding bullet” is probably the best way to describe this bike’s ability to descend. The Session picks up speed as if it has a hidden motor tucked away in its bottom bracket. Even after getting on the brakes hard mid-run, it gets right back up to speed as if it never slowed down at all. This is likely attributable to the fast-rolling 29-inch wheels; however, Trek’s geometry and detailed suspension tuning play a major role here. The Session is most at home eating up rough and rocky black-diamond trails but isn’t afraid to take on bigger jump lines, either. Park riders may find the 29-inch wheels harder to toss around; however, any rider looking to improve his or her time to the bottom of the mountain will benefit from the larger-diameter wheel.

TRICKS, UPGRADES OR TIPS?

Trek offers the Session as a frame-only option or as the compete model we tested. Our bike came with components suited for a pro racer; however, we made a few changes to enhance our control and confidence. First things first, we trimmed our seatpost to achieve a deeper insertion, allowing for more room to move above the bike. We then swapped out the Bontrager handlebar and stem for a Renthal cockpit and added a custom-printed ODI number plate.

BUYING ADVICE

Diehard downhill racers are more likely to purchase this bike than park rats. Trek designed this bike for riders looking for the fastest way down the mountain who aren’t afraid to put up the cash to do so. Trek continues to offer the 27.5-inch model, which sells for a more affordable $4730, and will likely suit the needs of riders wanting a fun park bike they can toss around jump trails. That said, the Session 29 is the ultimate weapon for riders who need it. The bike blasts down the mountain with precision and control, turning the gnarliest terrain into a casual walk in the park.  www.trekbikes.com

trek session 9.9 test

THERE ARE SO MANY WAYS TO GET MOUNTAIN BIKE ACTION

Mountain Bike Action is a monthly magazine devoted to all things mountain biking (yes, that’s 12 times a year because we never take a month off of mountain biking). It has been around since 1986 and we’re still having fun. Start a subscription by clicking here or calling (800) 767-0345.

Available from the Apple Newsstand for reading on your iPad, iPhone or iPod Touch.

Subscribe Here

Contact us via email at  [email protected]

trek session 9.9 test

New Product: Mobius X8 Wrist Brace

Video: Any One Of Us

Mountain Bike Action Magazine

mountainbikeaction

- Since 1986 - Covering All Aspects of ⛰🚲 #MBAmagazine

trek session 9.9 test

  • Bike Builds
  • Cross Country Bikes
  • Downhill Bikes
  • Enduro Bikes
  • Hardtail Bikes
  • Trail Bikes

FASTHOUSE TRACKER PACKABLE WINDBREAKER REVIEW

ABUS CLIFFHANGER MIPS HELMET REVIEW

EVIL LOOPHOLE WHEEL REVIEW – A CRACKING GOOD SET OF CARBON WHEELS

RAPHA TRAIL GORE-TEX INFINIUM JACKET REVIEW – A HIGH QUALITY RAIN JACKET WITH…

VIDEO: CHASING TRAIL EPISODE 38 – IN SEEK OF SQUAMISH, BC’S UNRIDDEN…

VIDEO: TRANSITION FACTORY RACING EP. 1 – FT. WILLIAM

“SLAY LA”—VIDEO

VIDEO PREVIEW OF THE PAN AMERICAN GAMES XCO COURSE

ASK MBA: HOW DO I REPLACE A BROKEN SPOKE?

ASK MBA: WHAT’S THE BEST WAY TO FLY WITH MY BIKE?

ASK MBA: WHY DO MY BIKE’S DISC BRAKE PADS KEEP RUBBING?

ASK MBA: WHY AM I HAVING TROUBLE ALIGNING SHIMANO MICROSPLINE COGS?

THE INS AND OUTS OF FRAME PROTECTION – THE BEST WAYS TO KEEP YOUR FRAME LOOKING…

HOW TO SERVICE A PRESS-FIT BOTTOM BRACKET

ASK MBA: SHOULD YOU REPLACE THE ROTOR ALONG WITH YOUR BRAKE PADS?

ASK MBA: HOW DO I DIAL IN MY FOX 34 FORK?

BIKE CHECK: BRYN ATKINSON’S PIVOT SHUTTLE LT E-BIKE

MATHIEU VAN DER POEL TELLS US ABOUT HIMSELF AND HIS MOUNTAIN BIKE, MBA SEPTEMBER 202O

BIKE CHECK: LARS FORSTER’S THÖMUS LIGHTRIDER WORLDCUP

The Greatest Riders in Mountain Bike History (Updated)

  • Mountain Bike Action
  • Digital Mountain Bike Action
  • Back Issues
  • NICA Team of the Month
  • B’s Buzz

DESTINATION: WHISKEY RUN OREGON – A NOT SO SECRET RIDING PARADISE

DESTINATION: SPIDER MOUNTAIN TEXAS – COME FOR THE BBQ, STAY FOR THE RIDING!

DESTINATION SLOVENIA – RIDING BENEATH THE EARTH

PHOTO GALLERY: THE BEST OF SEA OTTER CLASSIC 2024

CAPE EPIC STAGE 4 RESULTS AND FULL STAGE VIDEO

CAPE EPIC STAGE 3 RESULTS AND FULL STAGE VIDEO

READER SENDS: THIS MONTH’S BEST READER-SUBMITTED PHOTOS

READER SENDS – THIS MONTH’S BEST READER SUBMITTED PHOTOS

READER SENDS – THIS MONTH’S BEST READER SUBMITTED PHOTOS

  • Anneke’s Blog
  • Down The Trail

The Loam Wolf Logo

Trek Session 9.9 29

Words by Drew Rohde | Action Photos by Trevor Lyden

You’d never guess it by looking at the Trek Session 29’s meticulously clean lines or attention to detail, but Trek created this bike knowing full well that sales numbers would pale in comparison. Downhill bikes cater to an increasingly small percentage of riders, and 29-inch wheeled DH bikes are going to segment that group into an even smaller section. If you compare Session sales to Fuel, Remedy and Slash models, the world-renowned Session looks more like an experiment in marketing than good business. Despite the unlikely return on R&D, design time and production mold dollars, Trek forged ahead creating one of the most beautiful, downhill bikes I’ve ever seen. After ogling over a pre-production Session 9.9 29 at Crankworx Whistler, I was anxious to get a long-term tester to see if the love affair would last once things got down and dirty.

Trek Session 9.9 29

In an effort to remain open minded, I try to not study the numbers on our test bikes before I write reviews. I’ll be totally honest, I either didn’t know or totally forgot that the Session 9.9 29er had 190mm of travel. Regardless of my newfound knowledge, the bike handled everything I threw at it thanks to the Fox Factory Fit 40 RC2 fork and Fox Factory Float X2 shock. Oh yeah, and the 29” wheels.

Trek equips the Session 29 with all of their standard features you’ve come to know over the years. The Session 9.9 is their top of the line model, and the frame is built using Trek’s OCLV (Optimum Compaction Low Void) carbon process that has been evolving since 1991. A magnesium Evo Link houses the adjustable Mino Link chip – an easily adjustable piece of hardware that changes the head tube angle and BB height.

Frame features also include an integrated frame protector, Control Freak cable routing, Carbon Armor, ABP (Active Braking Pivot) 4-link suspension design and adjustable fixed-angle headset cups.

Trek Session 9.9 29

The Session 9.9 29er is race-ready and boasts a 7-speed Shimano Saint drivetrain and Shimano Saint brakes. A particular highlight I enjoy is the very sexy MRP G4 carbon chainguide. Rolling stock on the Trek Session 9.9 29 comes in the form of Bontrager Line DH 30 wheels, with Boost 110×20/157x12mm spacing. Bontrager G5 Team Issue 2.5” tires offer excellent grip, however I did flat the rear tube twice. I haven’t flatted a DH bike in years so I’m not sure if the tubes are especially thin or if it’s the tire. Either way, I went tubeless and haven’t had any issues since.

More Bontrager goodies fill the cockpit: Line Pro 820mm bars, a Line Pro Direct Mount 50mm stem and XR Trail Elite grips, which we removed pretty quickly. After a near death experience clipping a tree just before a drop, I cut down the bars to about 777mm, and while they have a strange look and feel at first, they weren’t something I focused on once I started riding.

Trek Session 9.9 29

I was both surprised and reaffirmed when I learned the Session 9.9 29er has 190mm of travel. As mentioned above, I don’t look at the details of a bike before riding it. Clearly I can’t be totally unaware of what some bikes offer, but I try to avoid the spec sheet until after my testing, or sometimes mid-test if something doesn’t feel right. I want to be open minded and let the bike speak to me during the test period without my brain telling me what I should be feeling based on a chart.

The shortened travel wasn’t something I completely noticed during my test rides, but in hindsight it made sense. What I mean by that is, the bike rode differently than the 27.5 and 26-inch Sessions when it came to landing drops or larger jumps. It did not feel harsh by any means, it just had a firmer feel that I attributed to more progression in the tune. I reached full travel every run during my testing, but never felt harsh hits or that I was out of travel. That doesn’t mean I wouldn’t like more though. If possible, I’d love to see this bike with 195mm or even 200mm of travel.

So how does it ride with those big wheels and shorter travel? Like a daggum rocket ship! I rode a demo bike briefly in Whistler Bike Park. It was slack, low and certainly better than some of the other bikes I rode that week, but I wanted more. It was a well-worn demo bike and I knew the understeer and suspension issues I experienced were tunable. Before hopping on the chairlift for my first ride, I got sacrilegious. I put the Mino Link in the High mode! Since I wasn’t dropping into Val Di Sole, I figured I had the ability to navigate the terrain I was about to ride with a head angle more nimble than 62.1 degrees.

Trek Session 9.9 29

What I felt on that first ride was pure magic. I had no understeer, the bike stood up a bit taller, was a little bit shorter and put me right where I wanted to be – in a position to command the bike. That first ride was the beginning of what I hope is a long relationship (Wink wink, Trek can I keep it?) I only spent about two runs tweaking suspensin and quickly settled in on my tune. As my speed increased with familiarization to the bike, I added about five more PSI and 2-3 clicks of compression depending on the track.

I’m not always a fan of the Fox 40, as it can ride a bit stiff and beat up my hands, but this fork feels buttery smooth and the rear shock is the same. I actually found that running a little bit more sag was preferred for my riding style and terrain. I don’t live for the jump lines, instead preferring the natural steeps and chunky stuff with natural gaps. The softer spring rate kept me on the ground when I wanted, but added compression prevented me from blowing through travel when I didn’t. I’m sure this softer set up is also why I was reaching bottom out on all my race-paced test runs, but this isn’t a bad thing according to some schools of thought. The trade off for regularly using all the travel is insane traction and confidence, well above what many other bikes have offered me.

While the suspension performance is a highlight of the Session 9.9 29, the thing that blew me away is the out and out speed of the bike. Specifically, how fast it gets up to speed. I took two practice runs down a newer trail at Mt. Bachelor that is a steep fall line and navigates everything from lava rock to flat, loose turns, massive ruts and very aggressive roots. During my sighting laps I’d inspect lines, erosion changes, etc. Every time I hopped back on the Session 29 and let off the brakes I was instantly back up to speed, like I’d never stopped. No pedal strokes needed, the bike just picked up steam and charged down the trail like I was trying to scare myself!

Trek Session 9.9 29

The larger wheels are definitely noticeable and something I was very aware of every time I got on the bike. This is both good and not so good. The bike feels a bit larger and gives me a feeling of being right in the middle of two massive steamrollers. Benefits of the big wheels are plentiful, as the bike is beyond stable and allows for errors in line selection or lazy riding while still maintaining top speed because the added roll-over ability offers a larger margin of error. However, if you screw up the entry to a tight turn like a switchback, the length and big wheels will not treat you well. Swinging wide is the way to go, but if you live to jackknife corners like you’re always being filmed for an Instagram edit, you’ll have your work cut out for you.

Another noteworthy point is the seat height. I’m not quite six foot and rode a size large and had to cut quite a bit off the seat post. If you think of DH bike seat post heights by comparing a World Cup racer to a FEST Series rider, you’ll know that there is a big difference in riding style. This bike is most definitely a racer as the larger wheels don’t allow for a totally slammed post, and this may be an issue for riders with short legs, especially if you’re a big jumper. Which is another place that the Session 9.9 29er didn’t completely blow me away.

Downhill bikes are very purpose specific tools, and this is very clearly a race rig, so I didn’t expect it to be a whip machine. I’m not Brendan Fairclough or some amazing rider, but the added rotational mass was definitely noted when I wanted to make quick changes in the air. Still, the 34.91-pound weight and poppy suspension feel kept me more than happy when I was playing around on the jumpy stuff.

Trek Session 9.9 29

The Wolf’s Last Word

Alright, so let’s pretend we’ve all got A.D.D and you just asked me if you should buy this bike because you don’t have time to read. If I had to reply in one word I’d say, “Hellyes!” BUT, I’m also very chatty when it comes to bikes so instead I’d like to ask what your budget is, what type of riding you prefer most and what you want out of your DH bike.

If you’ve got the budget, are looking for a flat out race machine to make you as competitive as possible, love plowing over shit as fast as you can, or want something to give you that extra little edge when it comes to racing the clock, then I think the Session 9.9 29er is probably one of my top recommendations. If you think spending over eight grand on a bicycle is ridiculous, love to jump, whip and slash, then I’d suggest looking at other options, perhaps a Session 8 27.5 ($4,279).

Ultimately, the Session 9.9 29 has become one of my favorite DH bikes in recent memory. Then again I’m the type of guy who goes to Whistler Bike Park and proudly skips A-Line in favor of the least popular woodsy DH tracks I can find. For me, the trade off in playfulness on the jump lines is well worth the added speed, traction and comfort on proper downhill trails. Just make sure you keep the spokes real tight, or else they’ll be making some weird noises!

Price: $8,399 Weight: 34.91 lbs Website: Trekbikes.com

Trek Session 9.9 29

CHASSIS Frame: OCLV Carbon; 190mm Fork: Fox Factory 40 Fit RC2; 190mm Shock: Fox Factory Float X2; 225x70mm

COCKPIT Brakes: Shimano Saint Handlebar: Bontrager Line Pro; 820mm Headset: FSA Orbit Saddle: Bontrager Arvada Seatpost: Bontrager Rhythm Elite Shifter: Shimano Saint; 10s Stem: Bontrager Line Pro DM; 50mm

WHEELS Hubs: Bontrager Rims: Bontrager Line DH 30 Tires: Bontrager G5 Team Issue; 29×2.5

DRIVETRAIN Bottom Bracket: Shimano BB80 Cassette: Shimano CS-5700; 11-25t Cranks: Shimano Saint M825; 34t Derailleur: Shimano Saint Shadow Plus; 10s

Trek Session 9.9 29

Those Beautiful Lines Fast! Composed and Stable Smooth Over Terrain Makes Us Faster

We don’t, can’t afford one rear axle sticks way out slow tight turns spoke noise, leave a comment & win free schwag.

Want to win some free schwag? Leave a comment and vote up the most thoughtful comments and each month we’ll pick a winner. The person with the smartest and most helpful replies will earn some sweet new gear. Join the Pack

trek session 9.9 test

Downhill Bikes

Trek session 9.9, stunningly crafted. effortless ride dynamic. one of the finest dh bikes in the world.

With eight or more years development behind it the Trek Session 9.9 has evolved into a highly regarded, almost intimidating race bike that delivers pace, well constructed damping characteristics and an impeccable build quality. When it comes to delivering performance and finish the Trek has few rivals. It has been a favourite for many years as we’ve found in past tests .

Trek themselves might well disapprove if we didn’t mention some of the key features of the Session 9.9 including the OCLV carbon, ABP (active braking pivot) which allows the suspension to work freely whether on the brakes or off, Full Floater suspension or Mino Link adjustable geometry but many of these were features that formed the first production Session bikes back in 2008. What Trek have done marvellously well is improve the bike year on year leading to this bike which was one of the first full carbon production 27.5” wheel bikes on the market.

trek session 9.9 test

What makes it so special? Very simply is its speed across the ground, but not like some bikes that are great on steep, tight technical but lack pace when the grounds become more level. The Session is fast – everywhere. Offering an engaging ride with precise steering geometry the Session similar to the Specialized Demo seems to build in momentum but in quite a different way. The Session is livelier than the Demo, easier to move around and slightly easier to crank on flatter grounds, the kind frequently found in between rougher sections of track.

“What Trek have done marvelously well is improve the bike year on year. Its also the most incredibly well finished and presented bike”

That doesn’t mean the Trek is lousy in the tougher stuff, oh no, from average damping beginnings in 2008 Jose Gonzalez and his team have stepped up the rear damping on the Session to a place that many can only dream of. Fox suspension played their part too in this process and for 2016 the Session comes with the finest Fox 40 yet to come from the Californian brand.

There are still a couple of minor negative points, for starters the adjustable geometry is still a shade on the high side and we’d like to see the current ‘high’ setting become the standard setting with the addition of a ‘low’ position. The XL is a good size for 6’ riders but there’s still a place for an XXL in the future. And in terms of components whilst the Shimano Saint’s are reliable brakes the Guide Ultimate’s and Code’s offer smoother and more consistent braking through the range. The bar and stem combination takes getting used to – bar too narrow, stem to low.

Overall however if we were to choose a bike for racing on the varied terrain that racing often throws up, then the Session is one of the bikes we would always reach out to. Its pedigree is impressive. A bike that Aaron Gwin steered to nine world cup wins in two seasons and that culminated in two World Cup series wins making it one of the most successful race bikes of all time.

YOU DIDN’T KNOW THIS BUT…

Dylan howes, trek r&d.

trek session 9.9 test

When we were developing the 27.5 bike, we actually made a full-on carbon prototype with prototype molds that we knew we wouldn’t go to production with. The geometry, suspension kinematics and tube shapes matched the 26” Session exactly with the only changes being wheel size, BB drop (same BB height) and fork offset to maintain the same trail number. We wanted to be able to feel what the wheel size difference felt like before we made any other changes to geometry and suspension kinematics.

Those changes were things like overall bike geometry (top tube length) and suspension improvements that we were planning on regardless of wheel size. On those protos, we also built a full carbon chainstay, which we hadn’t done on a downhill bike before. Even in prototype form, it cut a huge amount of weight from the aluminum (fine, aluminium!) stay and was really robust.

“The chainstay became one of the hardest parts to mold and took months of iterations on layups to get it to pass”

But, we felt we could do it even better and make assembly easier by changing exactly how we molded the parts for production. And then the problems really started! The chainstay became one of the hardest parts to mold and took months of iterations on layups to get it to pass. It became the longest development time of any carbon chainstay we had done, and led to the team, and your test bike, having aluminum chainstays to start the season.

We did solve the molding problem, created a lighter and stronger chainstay than we had in aluminum, and learned some good molding lessons. Future versions would be made like the proto’s. Sometimes you get it right the first time….

trek session 9.9 test

Trail and Enduro Bikes

Kona process 153dl.

The 2016 Kona Process 153DL is very simply one of the finest bikes Kona have ever made

trek session 9.9 test

Cube Fritzz 180 HPA SL

One of the lightest 180mm enduro mountainbikes ever made, the Cube Fritzz 180 HPA SL

trek session 9.9 test

Canyon Strive CF 8.0 Race

Adjustable 130-160mm enduro mountainbike at unbeatable price, the Canyon Strive CF 8.0 Race reviewed

trek session 9.9 test

Stunningly crafted. Effortless ride dynamic. The Trek Session 9.9 is one of the finest DH bikes ever made

trek session 9.9 test

Wheels & Tyres

trek session 9.9 test

Cranks, Gears, Brakes & Pedals

trek session 9.9 test

Featured in this post

Trek

Related Articles

trek session 9.9 test

Sprung Suspension

A tuning specialist with a difference... FoD.

trek session 9.9 test

Manitou Mattoc Pro 160mm Fork

Is this trail/enduro fork up there with the best?

trek session 9.9 test

Intense M16C Bike Test

The Godfathers or downhill bikes with their latest carbon offering.

trek session 9.9 test

Dirt Trek Downhill Fantasy League Riders and Prices!

Not final, but this should give you a good idea.

trek session 9.9 test

Josh Bryceland | 2016 DH Video Chapter 1

You gotta love the Rat action.

Privacy Overview

Newsletter terms & conditions.

Please enter your email so we can keep you updated with news, features and the latest offers. If you are not interested you can unsubscribe at any time. We will never sell your data and you'll only get messages from us and our partners whose products and services we think you'll enjoy.

Read our full Privacy Policy as well as Terms & Conditions .

  • Pinkbike.com
  • Register New User
  • First Looks
  • Friday Fails
  • Community Blogs
  • Fantasy League DH
  • Places Directory

Trek Session 9.9 DH 27.5 - Review

Trek Session

Cool Features

trek session 9.9 test

  • Rider Notes

2020 Trek Session 9.9 29

trek session 9.9 test

A 29″ carbon frame full suspension downhill bike with ultra high-end components. Compare the full range

Manufacturer Price

For This Bike

View more similar bikes →

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.

Session 9.9 29

Similar Bikes

(descending)

Add custom gearing

Mountain Bike Action

Mar 2019 · McCoy

Faster than a speeding bullet

Read Review

Loam Wolf

Nov 2018 · Drew Rohde

A review worth reading if you are considering a 29er DH bike. The Trek Session 9.9 downhill bike has a couple interesting quirks but is without a doubt one of the best DH bikes we've ridden in. If you're a racer looking for pick up speed and drop seconds, check this bike out!

Pinkbike

Oct 2018 · Paul Aston

One of the most successful, recognizable silhouettes on the DH circuit now comes with wagon wheels. So how does it compare to the newest crop of DH bikes?

Ultra light and stiff

Exceptional, simple finish

Balanced, aggressive geometry

Quick acceleration and efficient pedaling

Possibly too light and stiff

Top of the line price tag

Lacking traction in rough stuff

Reach may limit taller riders

BikeRadar

Sep 2018 · Seb Stott

A pricey bike let down by a basic fork, disappointing brakes and dated geometry

‘ABP’ rear suspension provides a solid, supple action

Relatively short front end feels cramped, high bottom bracket and short frame deliver a sometimes precarious-feeling ride, harsh fork and weak brakes are disappointing for the price

NSMB

If you're a DH racer, your special edition bike usually comes out during worlds - if you're good enough to qualify and your bike sponsor loves you.

Bicycling

May 2017 · Matt Phillips

All new carbon framesets for both 27.5 and 29 inch wheels for Trek's downhill race bike

BIKE Magazine

Trek releases the 2018 Session with updated geometry, refined linkage, and a revamped Float X2 shock. There's also a 29 inch version, which the internet will probably have nothing to say about.

May 2017 · Smurf

The world's first production, carbon 29er downhill bike

99 Spokes on YouTube

Last updated October 19 Not listed for 1,300 days

trek session 9.9 test

2016 Trek Session 9.9

Size Tested: Large

Geometry: (Here)

Build Overview:

  • Drivetrain: Shimano Saint
  • Brakes: Shimano Saint
  • Wheels: DT Swiss FR1950
  • Fork: Fox Factory 40 FIT RC2
  • Rear Shock: Fox DHX2 SLS

MSRP: $8,999

Wheels: 27.5′′

Travel: 203 mm Front, 210 mm Rear

Weight: 34.5 lbs, without pedals

Reviewer: 5’9”, 155 lbs.

Test Location: Whistler, BC

Test Duration: 2 Days

The Trek Session has been around for quite a while now, and while it’s seen some incremental changes, it’s still a pretty similar bike from years past. A couple years ago I spent a little time on the 2014 Session 9.9 , but I rode a size Medium, which felt pretty small for me (even though I’m usually pretty comfortable on Medium sized bikes). This time around, I got on a size Large courtesy of Summit Sport in Whistler , and with a bit more room to move around on the bike, I came away thoroughly impressed.

The Session series has 3 different build levels: the 8, the 88, and the 9.9. The 8 and 88 both run on an aluminum frame, while the 9.9 bumps up to a carbon affair. While the 9.9 runs top-of-the-line componentry throughout, it also runs a top-of-the-line price tag. The 8 and 88 are much more modest, with the 8 in particular sporting a smart selection of parts to keep the price tag under $4,000. The 88 gets a more middle of the road spec, although it would be nice to see a more adjustable fork than the Boxxer RC on a bike that costs $4,999.

Looking at the Session 9.9, it’s tough to pick a highlight of the build spec because, with a couple relatively minor exceptions, it’s pretty dialed.

For starters, the suspension: a Fox Factory 40 out front, paired with a DHX2 (with an SLS spring) on the rear. I’ve been spending a lot of time on the 2017 Fox downhill offerings, and I’ll be putting together a full review of both the 40 and the DHX2 a little later this summer. In the meantime, it’s abundantly clear that these are some of the best dampers on the market.

The 40 is the torsionally stiffest fork I’ve ridden, and it’s super tunable. I’ve been fiddling with mine to adapt it to sketchy, blown-out bike park trails, flowy jump lines, and steep, root-infested awesomeness. In each situation, I can get the fork’s setting to match the situation well.

The DHX2 rear shock is similarly adjustable, and I find more of the adjustment range to be usable than on something like a Cane Creek Double Barrel. Like the 40, I’ve found that I can easily tweak the shock to work well in a wide variety of scenarios. Plus, the SLS spring is crazy light — on my scale, it’s almost half the weight of a traditional steel spring.

The drivetrain and brakes on the 9.9 are Saint throughout, which is fantastic. Saint brakes are a perennial favorite as some of the more powerful stoppers on the market, although as a side note, I did get some interesting vibrations coming from the rear end — which is something that Trek’s World Cup team has tried to address with harmonic dampers. The Saint drivetrain shifts smoothly, and more importantly, is far more reliable than the SRAM DH drivetrains.

The Session 9.9 rolls on DT Swiss FR1950 wheels, and while I can’t speak to that specific wheelset’s long-term durability, I’ve spent a lot of time on the DT Swiss FR 570 rim (which is used in the FR1950 wheelset). I’ve put a few decent dents in my rim, but all in all, it’s held up pretty well.

The rubber on the Session 9.9 that I rode was the Bontrager G5 tire , which is one of the best DH tires on the market, in my opinion. They run a bit bigger than the Maxxis options, they last a bit longer than a DHRII, and they’re in the same ballpark in terms of cornering and braking traction (which is to say, they have lots of both).

Rounding out the build spec are a few Bontrager parts which, for the most part, get the job done just fine. My only gripe here is the carbon Bontrager bar; for starters, I’d rather have an aluminum bar on a DH bike simply because the bike is more likely to get crashed and the carbon could get damaged. But perhaps more importantly, the stock bar width is only 750 mm, which is pretty narrow for a DH bike. Wide bars can be cut narrower, but narrow bars can’t be made wider.

NEXT: Frame Geometry and Fit, Features and Construction, Etc.

Leave a Comment Cancel reply

trek session 9.9 test

Home

2019 Trek Session 9.9 29 Bike (discontinued)

s1600 2019 Trek Session 9.9 29 Bike

  • Write Review

Specifications

Sizes and geometry.

​ www.trekbikes.com ​

More Products

2023 Mondraker Summum R

2023 Mondraker Summum R Bike

2022 Pivot Phoenix 29 Ride (Black)

2022 Pivot Phoenix 29 Ride Bike

2023 Mondraker Summum R (29" version shown)

2023 Mondraker Summum R MX Bike

2022 Pivot Phoenix 29 Pro (Black)

2022 Pivot Phoenix 29 Pro Bike

2022 Atherton AM.200M.1

2022 Atherton AM.200 M.1 Bike

2023 Giant Glory Advanced

2023 Giant Glory Advanced Bike

2023 Pivot Phoenix 29 Pro Saint (Cement, with Reynolds Blacklabel DH Carbon rims)

2023 Pivot Phoenix 29 Pro Saint Bike

2022 Orange 279 Factory

2022 Orange 279 Factory Bike

  • Mountain Bikes
  • Trek Mountain Bikes
  • Trek Session
  • 2019 Trek Session

26% Off

Most Popular

Survey Header

Hello Vital MTB Visitor,

We’re conducting a survey and would appreciate your input. Your answers will help Vital and the MTB industry better understand what riders like you want. Survey results will be used to recognize top brands. Make your voice heard!

Five lucky people will be selected at random to win a Vital MTB t-shirt.

Thanks in advance,

The Vital MTB Crew

  • Rocky Mountain
  • Specialized
  • YT Industries
  • Allied Cycle Works
  • Black Market
  • DALLINGRIDGE
  • Diamondback
  • Early Rider
  • EVO Bicycles
  • Growler Bikes
  • Guerrilla Gravity
  • iGO Electric
  • Intense 951
  • Juiced Bikes
  • View all brands
  • Production Privee
  • Rad Power Bikes
  • Rambo Bikes
  • Riese & Müller
  • Soul Fast E Bikes
  • Spark Cycleworks
  • State Bicycle Co.
  • Structure Cycleworks
  • Surface 604
  • Van Nicholas
  • Vintage Electric
  • We Are One Composites

Cross Country mountain bikes

  • Cross Country

Trail mountain bikes

  • All Mountain

Enduro mountain bikes

Trek Session 9.9

  • AUS $ NZD $ USD $ CAD $ GBP £ EUR €

Size / SM, MD

Weight / 15.58

At a glance

Where to buy.

Trek Logo

Specifications

  • Frame OCLV Mountain Carbon w/InTension main frame, OCLV stays, ABP, Full Floater, HexMC carbon EVO Link, E2 tapered head tube, Mino Link, integrated frame protection, internal control routing, MicroTruss, Carbon Armor, ISCG mount, 210mm travel
  • Fork Fox Factory Float 40, Fox Factory 40 FIT RC2 w/air spring, Kashima Coat, hi/lo speed compression, 20mm thru axle, 203mm travel
  • Wheels DT Swiss FR1950 Gravity Classic, 20mm front, 157x12 rear
  • Wheel Size 27.5"
  • Tires Bontrager G4 Team Issue, 27.5x2.35"
  • Chain Shimano XTR, Shimano XTR
  • Crank Shimano Saint, Shimano Saint, 36T
  • Bottom Bracket Sealed cartridge
  • Rear Derailleur Shimano Saint, Shimano Saint, Shadow Plus
  • Shifters Shimano Saint, Shimano Saint, 10 speed
  • Brakeset Shimano Saint, Shimano Saint hydraulic disc
  • Handlebar Bontrager Rhythm Pro, OCLV Carbon, 31.8mm, 15mm rise
  • Saddle Bontrager Evoke 3, hollow titanium rails
  • Seatpost Bontrager Rhythm Elite, 2-bolt head, 31.6mm, zero offset
  • Stem Bontrager Direct Mount, 31.8mm
  • Grips Bontrager Rhythm, dual lock-on
  • Headset Cane Creek IS-3, E2, alloy cartridge

Q: How much is a 2017 Trek Session 9.9?

A 2017 Trek Session 9.9 is typically priced around $9,999 USD when new. Be sure to shop around for the best price, and also look to the used market for a great deal.

Q: Where to buy a 2017 Trek Session 9.9?

The 2017 Trek Session 9.9 may be purchased directly from Trek .

Q: How much does a 2017 Trek Session 9.9 weigh?

A 2017 Trek Session 9.9 weights 15.58.

Q: What size wheels does the 2017 Trek Session 9.9 have?

The 2017 Trek Session 9.9 has 27.5" wheels.

Q: What size 2017 Trek Session 9.9 should I get?

No comments on this bike yet. Why not be the first?

Leave a Reply Cancel reply

Your email address will not be published. Required fields are marked *

Want more MTB in your mailbox?

The latest on mountain bikes delivered straight to your mailbox.

trek session 9.9 test

More Bikes in Range View All

Trek Session AL Frameset

Trek Session AL Frameset

Trek Session 9 X01

Trek Session 9 X01

Trek Session 88 Downhill

Trek Session 88 Downhill

More downhill bikes view all.

Cube Hanzz 190 Race 27.5

Cube Hanzz 190 Race 27.5

Integrated brake post mount, Adaptable Syntace X12 hanger and through axle

Santa Cruz V10 S 29 / Carbon CC

Santa Cruz V10 S 29 / Carbon CC

Propain Spindrift CF 29

Propain Spindrift CF 29" Start

– PRO10 suspension system, – Internal cable routing, – SRAM UDH (Universal Derailleur Hanger), – Multiple customization options available via Propain website

Deals View All

View all deals, recent posts view all.

Blackburn Honest Digital Pressure Gauge Review

Blackburn Honest Digital Pressure Gauge Review

It's 2020 people. The squeeze and bounce test doesn't cut it anymore (and this is…

Comparing Mountain Bikes

Comparing Mountain Bikes

Mountain Bikes are complicated machines. They have parts from hundreds of different manufacturers, come in…

Undomestic Mountain Bikes: Here’s what we know

Undomestic Mountain Bikes: Here’s what we know

Update March 2020: Undomestic has announced that they are manufacturing frames "at this moment" and…

Send Feedback

Have a suggestion? Looking for a bike that's not on MTB Database? Or perhaps you've spotted an error?

We'd love to hear from you. Let us know with the form below.

This website uses cookies to ensure you get the best experience possible. Learn more.

About MTB Database

Explore, search and compare thousands of the world’s best mountain bikes here on Mountain Bike Database.

Compare prices, components, suspension, reviews, images and more on current and past MTB’s. You can even share reviews, comments and questions on mountain bikes. View and compare a huge selection of bikes from brands such as Trek , Specialized , Giant , Santa Cruz , Norco and more .

We strive to provide accurate and up-to-date information for mountain bikes on MTB Database. If you’ve spotted any issues, please let us know . We also include helpful tools, such as our frame size calculator, to assist you in choosing the right mountain bike. Bear in mind that these tools serve as a guide and simply provide a general indication. Refer to information provided by your bike manufacturer for the most applicable information for your bike.

Bikes By Brand

Bikes by year, bikes by riding style, bikes by wheel size, popular bikes.

  • 2022 Specialized Epic EVO Comp
  • 2022 Trek Marlin 6
  • 2022 Specialized Enduro Comp
  • 2022 Specialized S-Works Epic EVO
  • 2022 Specialized Epic EVO Expert
  • 2022 Giant Fathom 29 1
  • 2022 Trek Marlin 7

Latest Bikes

  • 2023 Commencal SUPREME DH V5 SIGNATURE 70'S
  • 2023 Orange Phase 29 Factory
  • 2022 Commencal META SX V4 TEAM Frame
  • 2023 Commencal SUPREME DH V5 SIGNATURE LTD
  • 2023 Commencal META SX V4 - Frame
  • 2023 Riese & Müller Swing4 vario
  • 2023 Riese & Müller Swing4 silent
  • Session 9.9 DH 27.5 Race Shop Limited

COMMENTS

  1. Bike Test: Trek Session 9.9 29

    The Session 9.9 is a purebred race bike equipped with nothing but the best. Starting with its suspension, we see a 190mm-travel Fox Factory 49 fork, which builds off the popular Fox 40; however, the arch is modified to allow clearance for a taller wheel. In back, Trek spec'd a 2019 Fox Factory Float X2 with a new mechanical bottom-out bumper ...

  2. Review: Trek Session 9.9 29

    Trek's Session has more heritage than any other downhill bike that is still on the circuit, ... Having multiple other Fox-equipped downhill bikes on test, getting the Session 9.9 set up was easy ...

  3. Trek Session 9.9 29er is an absolute rocket ship! Reviewed

    The Session 9.9 29er is race-ready and boasts a 7-speed Shimano Saint drivetrain and Shimano Saint brakes. A particular highlight I enjoy is the very sexy MRP G4 carbon chainguide. Rolling stock on the Trek Session 9.9 29 comes in the form of Bontrager Line DH 30 wheels, with Boost 110×20/157x12mm spacing.

  4. Trek Session 9.9

    Trek Session 9.9 Dylan Howes, Trek R&D ... It became the longest development time of any carbon chainstay we had done, and led to the team, and your test bike, having aluminum chainstays to start the season. We did solve the molding problem, created a lighter and stronger chainstay than we had in aluminum, and learned some good molding lessons ...

  5. Trek Session 9.9 DH 27.5

    The Session 9.9 is exceptionally light - our size large review bike weighed only 32.75 pounds - but Trek took measures to make sure that the frame remained stiff enough to handle all the ...

  6. 2019 Trek Session 9.9 29

    Review: Trek Session 9.9 29. A pricey bike let down by a basic fork, disappointing brakes and dated geometry. 'ABP' rear suspension provides a solid, supple action. Relatively short front end feels cramped, high bottom bracket and short frame deliver a sometimes precarious-feeling ride, harsh fork and weak brakes are disappointing for the ...

  7. 2012 Trek Session 9.9

    Low Speed Compression: 6 clicks in from full out. High Speed Compression: 8-10 clicks infrom full out. Hybrid Air Assist Pressure: 28-34 psi, depending on the terrain (for a 175 pound rider) Out back, the Session 9.9 relies on a custom tuned Fox DHX RC-4 with Kashima to control the bike's 210mm of rear travel.

  8. 2020 Trek Session 9.9 29

    2020 Trek. Session 9.9 29. A 29″ carbon frame full suspension downhill bike with ultra high-end components. Compare the full range. MSRP: $7,999: Weight:

  9. 2016 Trek Session 9.9

    MSRP: $8,999. Wheels: 27.5′′. Travel: 203 mm Front, 210 mm Rear. Weight: 34.5 lbs, without pedals. Reviewer: 5'9", 155 lbs. Test Location: Whistler, BC. Test Duration: 2 Days. 2016 Trek Session 9.9. The Trek Session has been around for quite a while now, and while it's seen some incremental changes, it's still a pretty similar bike ...

  10. Session 9.9 29

    Session 9.9 29. Model 592257. Retailer prices may vary. Session 9.9 is the pinnacle of downhill mountain bike performance. This is the same DH bike the pros ride, and it's built for one reason: going as fast as freakin' possible downhill. It pairs a SRAM X01 DH drivetrain and Code RSC brakes with our premium OCLV Mountain Carbon frame and top ...

  11. Trek Session 9.9 2016 Bike Test

    Trek Session 9.9 2016 Bike Test | Dirt Subscribe to Dirt Tv Here- http://bit.ly/1kSlM1GCheck out Dirt Magazine's Trek Session 9.9 2016 Bike Test. Join Dirt M...

  12. 2019 Trek Session 9.9 29

    The 2019 Trek Session 9.9 29 is an Downhill Carbon mountain bike. It sports 29" wheels and has Fox suspension. The bike is part of Trek 's Session range of mountain bikes. Session 9.9 is the pinnacle of downhill mountain bike performance. It's built for one reason: going as fast as freakin' possible down hills.

  13. 2019 Trek Session 9.9 29 Bike

    2019 Trek Session 9.9 29 Bike. Free shipping on orders over $50 (continental U.S. only). International shipping available. Some exclusions apply. Free standard shipping on all bikes (continental U.S. only). Flat rate shipping to Hawaii and Alaska. Free shipping on orders over $50 (continental U.S. only). International shipping available.

  14. Session 9.9 29

    Session 9.9 is the pinnacle of downhill mountain bike performance. This is the same DH bike the pros ride, and it's built for one reason: going as fast as freakin' possible downhill. It pairs a SRAM X01 DH drivetrain and Code RSC brakes with our premium OCLV Mountain Carbon frame and top-shelf RockShox suspension. Compare.

  15. 2020 Trek Session 9.9 29

    The 2020 Trek Session 9.9 29 is an Downhill Carbon mountain bike. It sports 29" wheels, is priced at $8,000 USD, has RockShox suspension and a SRAM drivetrain. The bike is part of Trek 's Session range of mountain bikes. Session 9.9 is the pinnacle of downhill mountain bike performance. This is the same DH bike the pros ride, and it's built ...

  16. 2012 Trek Session 9.9

    The Session 9.9 is all new for 2012, and the forth incarnation of Trek's Session downhill bike. It is built around an entirely new frame for 2012 that is manufactured at Trek's U. S. Four downhill bikes tested in one of Europe's best destinations - Pila, Aosta valley, Italy. The first mix of bikes in our search for the best downhill bikes ...

  17. Session

    Raking in thirteen World Cup DH gold medals, Session takes the cake as the winningest race bike of 2021. With plenty of gold medals under its belt, it's no surprise Session earned the title as the fastest downhill ride of the year from both Pinkbike and Global Mountain Bike Network. All speed, no hangups. Session's high-pivot suspension design.

  18. 2017 Trek Session 9.9

    The 2017 Trek Session 9.9 is an Downhill Carbon mountain bike. It sports 27.5" wheels, is priced at $9,999 USD, comes in a range of sizes, including SM, MD, has Fox suspension and a Shimano drivetrain. The bike is part of Trek 's Session range of mountain bikes.

  19. Session 9.9 DH 27.5 Race Shop Limited

    Weight. This bike has a maximum total weight limit (combined weight of bicycle, rider, and cargo) of 300 pounds (136 kg). Discover your next great ride with Session 9.9 DH 27.5 Race Shop Limited. See the bike and visit your local Trek retailer. Shop now!