Session 9 X01
Trek
Downhill
Session 9 X01 is an alloy downhill mountain bike (2025), by Trek, part of the Session family. It suits a wide range of riders thanks to its fit flexibility, leaning toward a balanced riding position, while being more at home in gravity-focused bike park riding. On MatchBikes metrics, it scores well for capable suspension support for rougher terrain, a balanced ride feel between comfort and directness, and good fit flexibility for dialing in rider position. Relative to category specialists, the trade-off 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 | 1.418 mm | 1.452 mm | 1.343 mm | 1.374 mm | 1.271 mm | 1.296 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 | 634 mm | 639 mm | 634 mm | 639 mm | 634 mm | 639 mm |
| Reach | 447 mm | 440 mm | 472 mm | 465 mm | 499 mm | 493 mm |
| Top Tube Length | 586 mm | 587 mm | 617 mm | 618 mm | 652 mm | 653 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 | 435 mm | 439 mm | 441 mm | 445 mm | 448 mm | 452 mm |
| Wheelbase | 1243 mm | 1246 mm | 1274 mm | 1277 mm | 1309 mm | 1312 mm |
| Bottom Bracket Drop | 12 mm | 21 mm | 12 mm | 21 mm | 12 mm | 21 mm |
| Standover Height | 755 mm | 747 mm | 759 mm | 751 mm | 757 mm | 749 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 |




























































