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
Weight33.7 lbs  
FrameCarbon
SuspensionFull, 190 / 190mm
ForkRockShox BoXXer Ultimate
ShockRockShox Super Deluxe Ultimate DH
Wheels29″ Aluminum
Drivetrain1 × 7
GroupsetX01
BrakesHydraulic Disc
Where to Buy
Similar Bikes

For This Bike

Accessories
Top Comparison
Insights
Ride Feel

Based on frame geometry and build specs.

Terrain
easyextreme
Handling
nimblestable
Session 9.9 29
Other Downhill bikes
Gearing

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.

Lowest gear

(climbing)

28 mph

Session 9.9 29

26 mph

Similar Bikes

Highest gear

(descending)

Reviews
Mountain Bike Action
Bike Test: Trek Session 9.9 29

Mar 2019 · McCoy

Faster than a speeding bullet

Read Review

Loam Wolf
Review: Trek Session 9.9 29

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!

Read Review

Pinkbike
Review: Trek Session 9.9 29

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?

Highs
  • Ultra light and stiff

  • Exceptional, simple finish

  • Balanced, aggressive geometry

  • Quick acceleration and efficient pedaling

Lows
  • Possibly too light and stiff

  • Top of the line price tag

  • Lacking traction in rough stuff

  • Reach may limit taller riders

Read Review

BikeRadar
Trek Session 8 27.5 review

Sep 2018 · Seb Stott

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

Highs
  • ‘ABP’ rear suspension provides a solid, supple action

Lows
  • 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

Read Review

NSMB
Cracked Dirt: TVS's Trek Session

Oct 2017

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.

Read Review

Bicycling
First Look: 2018 Trek Session

May 2017 · Matt Phillips

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

Read Review

BIKE Magazine
First Look: 2018 Trek Session 29 and 27.5

May 2017

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.

Read Review

Dirt Mountainbike
Trek launches production Session 29

May 2017 · Smurf

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

Read Review

Geometry
99 Spokes on YouTube99 Spokes on YouTube
Specs
Build
Frame

OCLV Mountain Carbon main frame & stays, tapered head tube, integrated frame protection, Control Freak internal routing, magnesium rocker link, Mino Link, ISCG mount, ABP, 12x157mm thru axle, 190mm travel

BB StandardBSA, 83mm, Threaded

Tire Clearance2.5"

ColorViper Red

Fork

RockShox Boxxer Ultimate, DebonAir spring, Charger 2 RC2 damper, straight steerer, 46mm offset, Boost, 110x20mm Maxle Stealth, 190mm travel

Travel190mm

Spring TypeAir

Shock

RockShox Super Deluxe Ultimate DH, 225x70mm

Travel190mm

Spring TypeAir

Bottom Bracket

SRAM DUB, 83mm, BSA threaded

Stem

Bontrager Line Pro, 35mm, Direct Mount, 50mm length

Handlebar

Bontrager Line Pro, OCLV Carbon, 35mm, 15mm rise, 820mm width

Saddle

Bontrager Arvada, austenite rails, 138mm width

Seatpost

Bontrager Rhythm Elite, 31.6mm, 0mm offset, 330mm length

TypeRigid

Pedals

Wellgo MG-1, magnesium body, Cro-Mo axle, replaceable pins

Grips

Bontrager XR Trail Elite, alloy lock-on

Groupset
Rear Derailleur

SRAM X01 DH

Crank

SRAM X01 DH, DUB 83, 36T, 56.5mm chainline, 165mm length

Shifters

SRAM X01 DH, 7 speed

Cassette

SRAM PG-720, 11-25, 7 speed

Chain

SRAM PC-1110, 11 speed

Brakes

SRAM Code RSC 4-piston hydraulic disc

TypeHydraulic Disc

Wheels
Rims

Bontrager Line DH 30, Tubeless Ready, 6-bolt, 110x20mm Boost thru axle

Tires

Bontrager G5 Team Issue, wire bead, 2-ply 60tpi, 29x2.50''

Disc Rotors

Size: S, M, L, XL, SRAM CenterLine, 6-bolt, round-edge, 180mm; Size: S, M, L, XL, SRAM CenterLine, 6-bolt, round-edge, 200mm

Rider Notes
Riders Also Viewed

Last updated October 19
Not listed for 1,251 days