Trek session 8 - Dominate The Descents
The Trek Session 8 2025 is a downhill bike that's ready to rip. With its all-new suspension design, you'll experience more traction, speed, and virtually no pedal kickback. This MTB comes stocked for speed with 29er wheels, but party-in-the-back riders can run a mixed setup with a 27.5˝ rear wheel, or even 27.5" front and rear for more agility. The bike also features a burly alloy frame, 200 mm rear travel with a Marzocchi Bomber shock and powerful Code R 4-piston brakes, making the bike perfect for tackling the descends and pushing your limits.
Why you'll love it:
- New suspension layout with a high pivot and idler pulley increases traction, carries more speed and reduces pedal kickback for more stability
- Virtually zero pedal kickback means that you’ll stay confidently planted and in control during descents – especially when landing jumps or drops
- The high pivot design delivers a more efficient rearward axle path so you’ll carry more speed and your wheel won’t get hung up on obstacles
- Adjust your suspension progression by flipping the lower shock mount chip – 20% for plush park rides, 25% for racing efficiency
-The new DH sizing system is based on reach, not rider height, which is the most important factor in a great downhill bike fit
The Final Word
The Session has always been the go-to DH bike. Now it's more of a ripper than ever thanks to a new suspension design that delivers more traction, speed and virtually no pedal kickback.
Geometry
| Frame size letter | R1 | R1 | R2 | R2 | R3 | R3 |
|---|---|---|---|---|---|---|
| Geometry position | High | Low | High | Low | High | Low |
| Wheel size | 29" | 29" | 29" | 29" | 29" | 29" |
| A - Seat tube | 42.5 | 42.5 | 42.5 | 42.5 | 42.5 | 42.5 |
| B - Seat tube angle | 61.6° | 61.0° | 61.6° | 61.0° | 61.6° | 61.0° |
| Effective seat tube angle | 77.1° | 76.5° | 77.1° | 76.5° | 77.1° | 76.5° |
| C - Head tube length | 11.7 | 11.7 | 11.7 | 11.7 | 11.7 | 11.7 |
| D - Head angle | 63.6° | 63.0° | 63.6° | 63.0° | 63.6° | 63.0° |
| E - Effective top tube | 58.6 | 58.7 | 61.7 | 61.8 | 65.2 | 65.3 |
| F - Bottom bracket height | 35.9 | 35.0 | 35.9 | 35.0 | 35.9 | 35.0 |
| G - Bottom bracket drop | 1.2 | 2.1 | 1.2 | 2.1 | 1.2 | 2.1 |
| H - Chainstay length | 43.5 | 43.9 | 44.1 | 44.5 | 44.8 | 45.2 |
| I - Offset | 4.6 | 4.6 | 4.6 | 4.6 | 4.6 | 4.6 |
| J - Trail | 13.1 | 13.6 | 13.1 | 13.6 | 13.2 | 13.6 |
| K - Wheelbase | 124.3 | 124.6 | 127.4 | 127.7 | 130.9 | 131.2 |
| L - Standover | 75.5 | 74.7 | 75.9 | 75.1 | 75.7 | 74.9 |
| M - Frame reach | 44.7 | 44.0 | 47.2 | 46.5 | 49.9 | 49.3 |
| N - Frame stack | 63.4 | 63.9 | 63.4 | 63.9 | 63.4 | 63.9 |
- FRAME:
- Alpha Platinum Aluminium, 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, 157x12 mm thru-axle, 200 mm travel
- FRAME MATERIAL:
- Aluminium
- FORK BRAND:
- RockShox
- FORK:
- RockShox Boxxer, DebonAir+ spring, Rush RC damper, 52 mm offset, BoostDH 110x20 Maxle Stealth, 200 mm travel
- FORK TRAVEL:
- 200 mm
- REAR SHOCK:
- R1 Marzocchi Bomber, 181 kg/400 lb spring, 250 mm x 72.5 mm/ R2 Marzocchi Bomber, 204 kg/450 lb spring, 250 mm x 72.5 mm/R3 Marzocchi Bomber, 227 kg/500 lb spring, 250 mm x 72.5 mm
- WHEEL SIZE:
- 29
- WHEELS:
- Bontrager Line DH 30, Tubeless Ready, 6-bolt, 110x20 mm Boost thru axle, 29"/Bontrager Line DH 30, Tubeless Ready, Rapid Drive 108, 6-bolt, Shimano 7 speed freehub, 157x12 mm thru axle, 29"
- TYRES:
- Bontrager G5 Team Issue, wire bead, 2-ply 60 tpi, 29x2.50"
- DROPPER SEATPOST:
- No
- SEATPOST:
- Bontrager Rhythm Elite, 31.6 mm, 0 mm offset, 330 mm length
- SADDLE:
- Bontrager Arvada, hollow chromoly rails, 138 mm width
- CRANKSET:
- Truvativ Descendant DH, DUB 83, 34-T steel ring, 165 mm length
- STEM:
- Bontrager Line Pro, 35 mm, Direct Mount, 50 mm length
- GRIPS:
- Bontrager XR Trail Elite, nylon lock-on
- SHIFTERS:
- SRAM GX DH, 7-speed
- BRAKE BRAND:
- SRAM
- HYDRAULIC BRAKES:
- Yes
- BRAKES:
- SRAM CODE Bronze 4-piston hydraulic disc
- REAR DERAILLEUR:
- SRAM GX DH, medium cage
- CHAIN:
- SRAM PC-1110, 11-speed
- NUMBER OF GEARS:
- 7 Speed
- PEDALS:
- Wellgo BO-87B, alloy body, Cro-Mo axle, replaceable pins
- FRONT MUDGUARD:
- MTB Monster Mudguard
- EXTRAS:
- N/A
- TYPE OF BIKE:
- Downhill
- DESIGNED FOR:
- Purely focused on conquering descents in the most efficient and aggressive way possible. Not designed for pedalling uphill and are typically loaded onto lifts or shuttles to reach the starting point.
- IDEAL TERRAIN:
- Descents with features like steep chutes, huge drops, challenging jumps and very technical rock gardens.
- PLEASE NOTE:
- Trek 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, colours, materials and pricing.
