2017 Trek Session 9.9 DH 27.5 Race Shop Limited vs 2019 Trek Session C 27.5 Frameset
The S is the Trek Session C 27.5 Frameset size closest to your M Trek Session 9.9 DH 27.5 Race Shop Limited. We match frame stack and reach. This is a geometry comparison, not a fit recommendation; stem, spacers, handlebars and saddle setup also affect your riding position.
What changes on the Trek Session C 27.5 Frameset
Compared with the Trek Session 9.9 DH 27.5 Race Shop Limited in M, the Trek Session C 27.5 Frameset in S places the top of the head tube 13 mm higher and about as far forward, relative to the bottom bracket. Its wheelbase is 11 mm longer, which can contribute to stability at speed.
- Frame stack
- +13 mm
- Higher front end
- Frame reach
- +2 mm
- About the same reach
- Wheelbase
- +11 mm
- Longer: steadier at speed
- Head angle
- −0.7°
- Slacker: calmer steering
- Chainstays
- +2 mm
- About the same
The two frames
We can't draw these frames yet. The Trek Session 9.9 DH 27.5 Race Shop Limited numbers we have for size M are missing the seat angle. The numbers below still compare.
Geometry side by side
| Measurement | Trek Session 9.9 DH 27.5 Race Shop Limited M | Trek Session C 27.5 Frameset S | Difference |
|---|---|---|---|
| Reach | 408 | 410 | +2 mm |
| Stack | 603 | 616 | +13 mm |
| Head tube angle | 64.2° | 63.5° | −0.7° |
| Effective top tube | 590 | 579 | −11 mm |
| Chainstay length | 443 | 445 | +2 mm |
| Wheelbase | 1205 | 1216 | +11 mm |
| BB drop | 9 | 20 | +11 mm |
| BB height | 364 | 356 | −8 mm |
| Standover | 793 | 738 | −55 mm |
| Seat tube length | 426 | 425 | −1 mm |
| Head tube length | 115 | 115 | ±0 mm |
Differences are the Trek Session C 27.5 Frameset minus the Trek Session 9.9 DH 27.5 Race Shop Limited. Full charts: 2017 Trek Session 9.9 DH 27.5 Race Shop Limited, 2019 Trek Session C 27.5 Frameset.
Where each sits in its class
Trek Session 9.9 DH 27.5 Race Shop LimitedTrek Session C 27.5 Frameset
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 DH 27.5 Race Shop Limited9.9 DH 27.5 Race Shop Limited | Trek Session C 27.5 Frameset27.5 Frameset |
|---|---|---|
| Frame | Trek OCLV | Trek OCLV |
| Fork | Fox 40 Factory | not listed |
| Shifter | Shimano Saint | not listed |
| Derailleur | Shimano Saint | not listed |
| Cassette | Shimano Ultegra | not listed |
| Chain | Shimano XTR | not listed |
| Crankset | Shimano Saint | not listed |
| Pedals | Wellgo MG-1 | not listed |
| Wheelset | DT Swiss FR1950 Gravity Classic | not listed |
| Tire | Bontrager G4 Team Issue | not listed |
| Brake | Shimano Saint | not listed |
| Handlebar | Bontrager Line | not listed |
| Stem | Race Face Atlas | not listed |
| Seatpost | Bontrager Rhythm Elite | not listed |
| Saddle | Bontrager Evoke 3 | not listed |
| Headset | not listed | FSA Orbit |
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