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  • Session 8 27.5
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It's right for you if...

You're a regular on the lifts and at the bike park. You're looking for a playful, versatile, durable DH rig with proven performance and a park-ready geometry, and want a lot of tech for your money.

The tech you get

An Alpha Platinum Aluminum frame with Mino Link adjustable geometry, a 200mm RockShox Boxxer Select fork with plush DebonAir spring, 210mm of rear travel with an adjustable FOX Performance VAN shock, 27.5˝ Bontrager Line DH 30 wheels, SRAM Guide R brakes, and a DH-specific SRAM GX 7-speed drivetrain. Race, rip, ride. This bike does it all.

The final word

Fast, durable, agile, and stable. Session 8 is fully capable of taking on the gnarliest descents, the biggest jumps, and the burliest trails. It's a versatile, confidence-inspiring ride with the best in DH tech and a geometry that's not so low and long that it doesn't play nice at the park.

See it in action

favorite_borderWhy you'll love it

  1. Session 8 has the heart of a monster truck: it rolls over everything, gives you the confidence to take on rougher trails, and saves you when you don't take the right line
  2. The quality suspension setup paired with our ABP frame design is made to keep you in control
  3. The durable, DH-specific 7-speed drivetrain keeps things simple, so you can focus on shredding and getting rad
  4. Mino Link lets you make small adjustments to your geometry quickly and easily, even mid-ride
  5. 27.5 wheels are great for flicking the bike around through the most technical trail

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Features

Active Braking Pivot

Active Braking Pivot

Active Braking Pivot allows our engineers to tune how the suspension reacts to acceleration and braking forces independently. That means you get more confident control when you need it most.

Learn more
Suspension Calculator

Suspension Calculator

This suspension calculator will help you optimize your suspension settings for your riding weight. Simply follow the steps to find your best set up.

Learn more
Mino Link adjustable geometry

Mino Link adjustable geometry

Fine tune head tube angle by 1/2° and BB height by up to 10mm with the simple turn of a nut. Just flip the link to choose between slack or slacker geometry, without negatively affecting suspension performance. A Trek exclusive.

Learn more
Down tube guard

Down tube guard

Replaceable external shield protects the down tube from trail debris.

Specifications

*spec applies to all sizes unless otherwise noted

Frameset
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
Fork RockShox Boxxer Select, DebonAir spring, Charger RC damper, 46mm offset, 20x110mm Boost thru axle, 200mm travel
Max compatible fork travel 200mm
Wheels
Wheel front Bontrager Line DH 30, Tubeless Ready, 6-bolt, 110x20mm Boost thru axle
Wheel rear Bontrager Line DH 30, Tubeless Ready, 6-bolt, 157x12mm thru axle
Tire Bontrager G4 Team Issue, Inner Strength sidewalls, wire bead, 60 tpi, 27.5x2.40''
Max tire size 27.5x2.40"
Drivetrain
Shifter SRAM GX DH, 7 speed
Rear derailleur SRAM GX DH
Crank Truvativ Descendant DH, DUB 83, 34T steel ring, 165mm length
Bottom bracket SRAM DUB, 83mm, BSA threaded
Cassette SRAM PG-720, 11-25, 7 speed
Chain SRAM PC-1110, 11 speed
Pedal Wellgo BO-87B, alloy body, Cro-Mo axle, replaceable pins
Max chainring size 36T
Components
Saddle Bontrager Arvada, hollow chromoly rails, 138mm width
Seatpost Bontrager Rhythm Elite, 31.6mm, 0mm offset, 330mm length
Handlebar Bontrager Line, alloy, 35mm, 27.5mm rise, 780mm width
Grips Bontrager XR Trail Elite, alloy lock-on
Stem Bontrager Line Pro, 35mm, Direct Mount, 50mm length
Headset FSA Orbit, sealed cartridge bearing, 1-1/8'' top, 1.5'' bottom
Brake SRAM Guide R 4-piston hydraulic disc, 200mm front rotor, 180mm rear rotor
*Brake rotor Size: S, M, L, XL
SRAM CenterLine, 6-bolt, round-edge, 180mm
Size: S, M, L, XL
SRAM CenterLine, 6-bolt, round-edge, 200mm
Weight
Weight M - 16.27 kg / 35.87 lbs (with tubes)
Weight limit This bike has a maximum total weight limit (combined weight of bicycle, rider, and cargo) of 300 pounds (136 kg).
We reserve the right to make changes to the product information contained on this site at any time without notice, including with respect to equipment, specifications, models, colors, and materials.
Bike and frame weights are based off Trek pre-production painted frames at time of publication. Weights may vary in final production.

Sizing & fit

The charts below show our recommended sizes based on height, but there are some other factors, like arm and leg length, that determine a great fit. That’s why you’ll see some overlap in our recommendations. Not every rider who’s 5´8˝, for example, will fit on the same size bike. The best way to find your perfect fit is to consult the experts at your local Trek retailer.

 

Rider Height

Inseam

All measurements provided in cm unless otherwise noted.

Frame size letter Geometry position Wheel size A — Seat tube B — Seat tube angle C — Head tube length D — Head angle E — Effective top tube F — Bottom bracket height G — Bottom bracket drop H — Chainstay length I — Offset J — Trail K — Wheelbase L — Standover M — Frame reach N — Frame stack
S High 27.5" 42.6 57.6° 11.5 64.2° 57.0 36.4 0.9 44.3 5.2 11.4 118.5 81.0 38.9 60.3
M High 27.5" 42.6 57.6° 11.5 64.2° 59.0 36.4 0.9 44.3 5.2 11.4 120.5 79.3 40.8 60.3
L High 27.5" 45.6 57.6° 11.5 64.2° 61.4 36.4 0.9 44.3 5.2 11.4 122.9 79.0 43.2 60.3
XL High 27.5" 45.6 57.6° 11.5 64.2° 63.8 36.4 0.9 44.3 5.2 11.4 125.3 77.5 45.6 60.3
S Low 27.5" 42.6 57.0° 11.5 63.6° 57.4 35.6 -0.1 44.5 5.2 11.8 118.3 80.4 38.2 60.7
M Low 27.5" 42.6 57.0° 11.5 63.6° 59.4 35.6 -0.1 44.5 5.2 11.8 120.3 79.0 40.2 60.7
L Low 27.5" 45.6 57.0° 11.5 63.6° 61.8 35.6 -0.1 44.5 5.2 11.8 122.7 78.4 42.6 60.7
XL Low 27.5" 45.6 57.0° 11.5 63.6° 64.2 35.6 -0.1 44.5 5.2 11.8 125.1 76.7 45.0 60.7

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