Session 8 29 GX
Trek
Downhill
Session 8 29 GX is an alloy downhill mountain bike (2024), by Trek, from the Session lineup. It suits riders looking for a balanced off-road setup, with a setup that gives you a balanced riding position, and is 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. At the same time, the main limitation versus more focused builds is less emphasis on outright speed than speed-focused builds and a value score that depends more on priorities than pure price efficiency. Next step: compare this bike with other downhill models on MatchBikes.com.
Rating

Score Summary
Performance
Built for speed and efficiency
Fit
Dialed-in Fit & Comfort
Value
Specifications
General
Frame
Drivetrain
Wheels
Brakes
Cockpit
Seat
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" |
| Rider Min Height | 161 cm | 161 cm | 173 cm | 173 cm | 186 cm | 186 cm |
| Rider Max Height | 176 cm | 176 cm | 188 cm | 188 cm | 196 cm | 196 cm |




























































