2013 Trek Session 9.9 vs 2015 Specialized Demo 8 Frameset
The M is the Specialized Demo 8 Frameset size closest to your L Trek Session 9.9. 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 Specialized Demo 8 Frameset
Compared with the Trek Session 9.9 in L, the Specialized Demo 8 Frameset in M places the top of the head tube 5 mm higher and 3 mm further back, relative to the bottom bracket. Its wheelbase is 3 mm longer, which can contribute to stability at speed.
- Frame stack
- +5 mm
- Higher front end
- Frame reach
- −3 mm
- Shorter frame reach
- Wheelbase
- +3 mm
- Longer: steadier at speed
- Head angle
- −0.7°
- Slacker: calmer steering
- Chainstays
- −9 mm
- Shorter: livelier
The two frames
We can't draw these frames yet. The Trek Session 9.9 numbers we have for size L are missing the seat angle. The numbers below still compare.
Geometry side by side
| Measurement | Trek Session 9.9 L | Specialized Demo 8 Frameset M | Difference |
|---|---|---|---|
| Reach | 423 | 420mm | −3 mm |
| Stack | 609 | 614mm | +5 mm |
| Head tube angle | 64.2° | 63.5° | −0.7° |
| Effective top tube | 607 | 588mm | −19 mm |
| Chainstay length | 439 | 430mm | −9 mm |
| Wheelbase | 1206 | 1209mm | +3 mm |
| BB drop | 21 | not listed | |
| BB height | 364 | 343mm | −21 mm |
| Standover | 780 | 707mm | −73 mm |
| Seat tube length | 440 | 394mm | −46 mm |
| Head tube length | 125 | not listed |
Differences are the Specialized Demo 8 Frameset minus the Trek Session 9.9. Full charts: 2013 Trek Session 9.9, 2015 Specialized Demo 8 Frameset.
Where each sits in its class
Trek Session 9.9Specialized Demo 8 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 9.99.9 | Specialized Demo 8 FramesetS-Works Frameset |
|---|---|---|
| Frame | Trek OCLV | not listed |
| Fork | Fox Factory | not listed |
| Shifter | Shimano Saint | not listed |
| Derailleur | Shimano Saint Shadow Plus | not listed |
| Cassette | Shimano Ultegra | not listed |
| Crankset | Shimano Saint | not listed |
| Pedals | Wellgo MG-1 | not listed |
| Tire | Bontrager G4 Team | not listed |
| Brake | Shimano Saint | not listed |
| Handlebar | Bontrager Rhythm | not listed |
| Stem | TruVativ Holzfeller | not listed |
| Headset | Cane Creek E2 | not listed |
| Seatpost | Bontrager Rhythm Elite | not listed |
| Saddle | Bontrager Evoke 3 | not listed |
| Rear shock | not listed | Öhlins TTX22M |
Know what is on every bike.
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