Trek Session 8 29 GX

Trek Session 8 29 GX Overview

The Trek Session 8 29 GX is a downhill mountain bike built with an Alpha Platinum Aluminum frame, 200mm rear travel, and a RockShox Boxxer 200mm fork. The frame features a high main pivot, idler pulley, integrated frame protection, internal or external routing, magnesium rocker link, Mino Link, ISCG 05 2-bolt mount, Active Braking Pivot, and 157x12mm thru axle.

Front suspension comes from a RockShox Boxxer fork with DebonAir+ spring, Rush RC damper, 52mm offset, BoostDH 110×20 Maxle Stealth axle, and 200mm travel. Rear suspension uses a Marzocchi Bomber shock with a 250mm x 72.5mm size and size-specific spring rates: 400lb on R1, 450lb on R2, and 500lb on R3.

The wheel setup uses Bontrager Line DH 30 29-inch wheels with Tubeless Ready construction and 6-bolt rotor mounting. The rear wheel includes Rapid Drive 108, a Shimano 7-speed freehub, and a 157x12mm thru axle. Tire specification is Bontrager G5 Team Issue, wire bead, 2-ply 60 tpi, 29×2.50”.

The drivetrain combines a SRAM GX DH 7-speed shifter, SRAM GX DH medium cage rear derailleur, SRAM PG-720 11-25T 7-speed cassette, and SRAM PC-1110 11-speed chain. The crankset is a Truvativ Descendant DH with DUB 83, a 34T steel ring, and 165mm crank length.

Braking is handled by SRAM Maven Bronze 4-piston hydraulic disc brakes with SRAM CenterLine and Centerline 2.0 6-bolt rotors. Finishing parts include a Verse Short Comp saddle, Bontrager Rhythm Elite seatpost, Bontrager Line alloy handlebar, Trek Line Pro lock-on grips, Bontrager Line Pro Direct Mount stem, FSA Orbit headset, and Wellgo BO-87B alloy platform pedals.

Key Features of Trek Session 8 29 GX

• Alpha Platinum Aluminum frame includes a high main pivot, idler pulley, integrated frame protection, and 200mm travel.
• RockShox Boxxer fork uses DebonAir+ spring, Rush RC damper, BoostDH spacing, and 200mm travel.
• Marzocchi Bomber rear shock uses a 250mm x 72.5mm size with spring rate matched by frame size.
• Bontrager Line DH 30 29-inch wheels use Tubeless Ready construction and 6-bolt rotor mounting.
• Bontrager G5 Team Issue 29×2.50” tires use wire beads and 2-ply 60 tpi construction.
• SRAM GX DH 7-speed drivetrain uses an 11-25T cassette and medium cage rear derailleur.
• Truvativ Descendant DH crankset uses DUB 83, a 34T steel ring, and 165mm crank length.
• SRAM Maven Bronze 4-piston hydraulic disc brakes are paired with SRAM 200mm and 220mm rotor specifications.

Ride Use

This bike fits the downhill mountain bike category, with 200mm frame travel, a RockShox Boxxer 200mm fork, Bontrager Line DH 30 wheels, and Bontrager G5 Team Issue 29×2.50” tires. The SRAM GX DH 7-speed drivetrain, SRAM Maven Bronze 4-piston hydraulic disc brakes, and Alpha Platinum Aluminum frame match the supplied downhill build specification.

Why Choose This Bike

Choose this bike for a downhill build centered on Trek’s Alpha Platinum Aluminum Session frame, high main pivot suspension layout, 200mm travel, RockShox Boxxer fork, and Marzocchi Bomber rear shock. It also includes Bontrager Line DH 30 29-inch wheels, Bontrager G5 Team Issue 29×2.50” tires, SRAM GX DH 7-speed drivetrain, SRAM Maven Bronze 4-piston hydraulic disc brakes, and Bontrager Line Pro cockpit parts. It comes in Chameleon Green, with an R2 weight of 19.05 kg / 42 lbs with tubes.