2020 Trek

Session 8 27.5

A 27.5″ aluminum frame full suspension downhill bike with high-end components.
Compare the full range

Manufacturer Price

$4,729
Weight35.9 lbs  
FrameAluminum
SuspensionFull, 210 / 200mm
ForkRockShox BoXXer Select
Wheels27.5″ Aluminum
Drivetrain1 × 7
GroupsetGX, Truvativ Descendant
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 8 27.5
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)

25 mph

Session 8 27.5

26 mph

Similar Bikes

Highest gear

(descending)

Reviews
Loam Wolf
Review: Trek Session 9 X01 2022

Oct 2021 · Drew Rohde

If you’re looking for a bad ass downhill bike that will literally have you taking your fingers off the brakes longer as it floats over the chunder beneath you, the 2022 Trek Session 9 is worth a solid look.

Highs
  • Holy Moly Fast!

  • Smooth as butter

  • Fair value

  • Inspires confidence like few others

  • Looks good, paint splatter!

  • G5 Tires

Lows
  • 180mm rear brake rotor

  • Rear end can be awkward, long feeling in tight, slow corners

  • Handlebar sweep/lack of rise

Read Review

Pinkbike
First Ride: 2022 Trek Session - Nope, Not Going to Say It

Apr 2021 · Dan Roberts

Out of the box the Session is a full 29” bike with the Mino link giving a High or Low setting..

Read Review

Mountain Bike Action
Bike Test: Trek Session 9.9 29

Mar 2019 · McCoy

Faster than a speeding bullet

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

Alpha Platinum Aluminum, tapered head tube, internal control routing, integrated frame protection, downtube guard, ISCG 05 mount, magnesium rocker link, Mino Link, ABP, 157x12mm thru axle, 210mm travel

BB StandardBSA, 83mm, Threaded

Tire Clearance2.4"

Fork

RockShox Boxxer Select, DebonAir spring, Charger RC damper, 46mm offset, 20x110mm Boost thru axle, 200mm travel

Travel200mm

Spring TypeAir

Bottom Bracket

SRAM DUB, 83mm, BSA threaded

Headset

FSA Orbit, sealed cartridge bearing, 1-1/8'' top, 1.5'' bottom

Stem

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

Handlebar

Bontrager Line, alloy, 35mm, 27.5mm rise, 780mm width

Saddle

Bontrager Arvada, hollow chromoly rails, 138mm width

Seatpost

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

TypeRigid

Pedals

Wellgo BO-87B, alloy body, Cro-Mo axle, replaceable pins

Grips

Bontrager XR Trail Elite, alloy lock-on

Groupset
Rear Derailleur

SRAM GX DH

Crank

Truvativ Descendant DH, DUB 83, 34T steel ring, 165mm length

Shifters

SRAM GX DH, 7 speed

Cassette

SRAM PG-720, 11-25, 7 speed

Chain

SRAM PC-1110, 11 speed

Brakes

SRAM Guide R 4-piston hydraulic disc, 200mm front rotor, 180mm rear rotor

TypeHydraulic Disc

Wheels
Rims

Front: Bontrager Line DH 30, Tubeless Ready, 6-bolt, 110x20mm Boost thru axle, Rear: Bontrager Line DH 30, Tubeless Ready, 6-bolt, 157x12mm thru axle

Tires

Bontrager G4 Team Issue, Inner Strength sidewalls, wire bead, 60 tpi, 27.5x2.40''

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 July 17
Not listed for 1,373 days