2021 Trek Session 9.9 29 vs 2023 Trek Session C 29
The Trek Session C 29 size closest to your M is the M. Compare the M instead
What changes on the Trek Session C 29
Compared with the Trek Session 9.9 29 in M, the Trek Session C 29 in L places the top of the head tube at about the same height and 21 mm further forward, relative to the bottom bracket. Its wheelbase is 21 mm longer, which can contribute to stability at speed.
- Frame stack
- ±0 mm
- About the same height
- Frame reach
- +21 mm
- Longer frame reach
- Wheelbase
- +21 mm
- Longer: steadier at speed
- Head angle
- ±0.0°
- About the same head angle
- Chainstays
- ±0 mm
- About the same
The two frames
Trek Session 9.9 29, MTrek Session C 29, LDrawn to scale and lined up at the bottom bracket.
Geometry side by side
| Measurement | Trek Session 9.9 29 M | Trek Session C 29 L | Difference |
|---|---|---|---|
| Reach | 419 | 440 | +21 mm |
| Stack | 616 | 616 | ±0 mm |
| Head tube angle | 62.6° | 62.6° | ±0.0° |
| Seat tube angle | 73.6° | 73.6° | ±0.0° |
| Effective top tube | 601 | 622 | +21 mm |
| Chainstay length | 452 | 452 | ±0 mm |
| Wheelbase | 1247 | 1268 | +21 mm |
| BB drop | 16 | 16 | ±0 mm |
| BB height | 356 | 356 | ±0 mm |
| Standover | 742 | 749 | +7 mm |
| Seat tube length | 425 | 456 | +31 mm |
| Head tube length | 115 | 115 | ±0 mm |
Differences are the Trek Session C 29 minus the Trek Session 9.9 29. Full charts: 2021 Trek Session 9.9 29, 2023 Trek Session C 29.
Where each sits in its class
Trek Session 9.9 29Trek Session C 29
Each bike is ranked against the other downhill bikes on Quiver, on frame geometry alone. Not your hand position or ride feel.
What each ships with
The stock build of each bike's first listed trim. Parts that match are dimmed.
| Part | Trek Session 9.9 299.9 29 | Trek Session C 2929 |
|---|---|---|
| Frame | Trek OCLV | not listed |
| Fork | RockShox BoXXer Ultimate | not listed |
| Shifter | SRAM X0 1 DH | not listed |
| Derailleur | SRAM X01 DH | not listed |
| Cassette | SRAM GX DH | not listed |
| Chain | SRAM PC1110 | not listed |
| Crankset | SRAM X01 DH | not listed |
| Bottom bracket | SRAM DUB | not listed |
| Pedals | Wellgo MG-1 | not listed |
| Wheelset | Bontrager Line DH 30 | not listed |
| Tire | Bontrager G5 Team Issue | not listed |
| Brake | SRAM Code RSC | not listed |
| Handlebar | Bontrager Line | not listed |
| Stem | Bontrager Line | not listed |
| Headset | FSA Orbit | not listed |
| Seatpost | Bontrager Rhythm Elite | not listed |
| Saddle | Bontrager Arvada | not listed |
| Rear shock | not listed | RockShox Super Deluxe DH Ultimate |
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