Session 8 29 GX
Trek
Downhill
Session 8 29 GX is an alloy downhill mountain bike (2022), by Trek, part of the Session family. It suits riders who want a more active, performance-leaning off-road feel, leaning toward a sporty, active riding position, while being more at home in gravity-focused bike park riding. Based on the metrics, key strengths are capable suspension support for rougher terrain and a balanced ride feel between comfort and directness. Compared with more specialized alternatives, the compromise is less emphasis on outright speed than speed-focused builds. Compare this bike across categories on MatchBikes.com to see whether a nearby segment gives you a better fit.
6.9
Rating

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Score Summary
Performance
6.7
Value
5.7
Fit
8.0
Performance
Built for speed and efficiency
Speed
2.7
Very Low
Climbing Efficiency
2.5
Hefty but Manageable
Suspension
10.0
Extreme rough-terrain ready
Fit
Dialed-in Fit & Comfort
Riding Position
7.7
Sporty
Fit Flexibility
6.8
Moderately Adjustable
Ride Comfort
8.7
Balanced
Value
Value for Money
5.7
Fair Value
Surface Range
Bike ParkSpecifications
General
Brand
Trek
Model
Session 8 29 GX
Year
2022
Price
$4,999
Weight
17.68 kg
Category
Mountain
Sub Category
Downhill
Groupset
GX, Truvativ Descendant
Wheels
29"
Frame
Frame
Alpha Platinum Aluminum, 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, 157x12mm thru axle, 200mm travel
Suspension Fork
RockShox Boxxer Select, DebonAir spring, Charger RC damper, 46mm offset, 20x110mm Boost thru axle, 200mm travel
Rear Shock
Size: R1, Fox VAN Performance, 400lb spring, 250x72.5mm; Size: R2, Fox VAN Performance, 450lb spring, 250x72.5mm; Size: R3, Fox VAN Performance, 500lb spring, 250x72.5mm
Suspension Type
Full
Drivetrain
Shift Levers
SRAM GX DH, 7 speed
Rear Derailleur
SRAM GX DH, medium cage
Cassette
SRAM PG-720, 11-25, 7 speed
Crank
Truvativ Descendant DH, DUB 83, 34T steel ring, 165mm length
Bottom Bracket
SRAM DUB, 83mm, BSA threaded
Chain
SRAM PC-1110, 11 speed
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''
Brakes
Brake Type
Hydraulic Disc
Brake Description
SRAM Code R 4-piston hydraulic disc
Cockpit
Stem
Bontrager Line Pro, 35mm, Direct Mount, 50mm length
Handlebar
Bontrager Line, alloy, 35mm, 27.5mm rise, 780mm width
Grips
Bontrager XR Trail Elite, nylon lock-on
Seat
Saddle
Bontrager Arvada, hollow chromoly rails, 138mm width
Seatpost
Bontrager Rhythm Elite, 31.6mm, 0mm offset, 330mm length
Geometry
| Measurement | R1 High | R1 Low | R2 High | R2 Low | R3 High | R3 Low |
|---|---|---|---|---|---|---|
| Stack Reach Ratio | 1.43 mm | 1.46 mm | 1.35 mm | 1.38 mm | 1.28 mm | 1.3 mm |
| Bottom Bracket Height | 359 mm | 350 mm | 359 mm | 350 mm | 359 mm | 350 mm |
| Front Center | 808 mm | 808 mm | 833 mm | 833 mm | 861 mm | 861 mm |
| Rake | 47 mm | 47 mm | 47 mm | 47 mm | 48 mm | 47 mm |
| Trail | 131 mm | 136 mm | 131 mm | 136 mm | 132 mm | 136 mm |
| Stack | 625 mm | 630 mm | 625 mm | 630 mm | 625 mm | 630 mm |
| Reach | 438 mm | 431 mm | 463 mm | 456 mm | 490 mm | 484 mm |
| Top Tube Length | 577 mm | 578 mm | 608 mm | 609 mm | 643 mm | 644 mm |
| Seat Tube Angle | 77.1 ° | 76.5 ° | 77.1 ° | 76.5 ° | 77.1 ° | 76.5 ° |
| Seat Tube Length | 425 mm | 425 mm | 425 mm | 425 mm | 425 mm | 425 mm |
| Head Tube Angle | 63.6 ° | 63 ° | 63.6 ° | 63 ° | 63.6 ° | 63 ° |
| Head Tube Length | 117 mm | 117 mm | 117 mm | 117 mm | 117 mm | 117 mm |
| Chainstay Length | 426 mm | 430 mm | 432 mm | 436 mm | 439 mm | 443 mm |
| Wheelbase | 1234 mm | 1237 mm | 1265 mm | 1268 mm | 1300 mm | 1303 mm |
| Bottom Bracket Drop | 12 mm | 21 mm | 12 mm | 21 mm | 12 mm | 21 mm |
| Standover Height | 746 mm | 738 mm | 750 mm | 742 mm | 748 mm | 740 mm |
| Wheels | 29" | 29" | 29" | 29" | 29" | 29" |




























































