2016 Trek Session 9.9 vs 2018 Specialized Demo I Alloy
The Specialized Demo I Alloy size closest to your M is the M. Compare the M instead
What changes on the Specialized Demo I Alloy
Compared with the Trek Session 9.9 in M, the Specialized Demo I Alloy in SHORT places the top of the head tube 11 mm higher and 13 mm further back, relative to the bottom bracket. Its wheelbase is 22 mm shorter, which can contribute to quicker direction changes.
- Frame stack
- +11 mm
- Higher front end
- Frame reach
- −13 mm
- Shorter frame reach
- Wheelbase
- −22 mm
- Shorter: quicker to change direction
- Head angle
- −0.7°
- Slacker: calmer steering
- Chainstays
- −13 mm
- Shorter: livelier
The two frames
We can't draw these frames yet. The Trek Session 9.9 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 M | Specialized Demo I Alloy SHORT | Difference |
|---|---|---|---|
| Reach | 408 | 395mm | −13 mm |
| Stack | 603 | 614mm | +11 mm |
| Head tube angle | 64.2° | 63.5° | −0.7° |
| Effective top tube | 590 | 571mm | −19 mm |
| Chainstay length | 443 | 430mm | −13 mm |
| Wheelbase | 1205 | 1183mm | −22 mm |
| BB drop | 9 | 12mm | +3 mm |
| BB height | 364 | 342mm | −22 mm |
| Standover | 793 | 698mm | −95 mm |
| Seat tube length | 426 | 367mm | −59 mm |
| Head tube length | 115 | 105mm | −10 mm |
| Seat tube angle | not listed | 74° |
Differences are the Specialized Demo I Alloy minus the Trek Session 9.9. Full charts: 2016 Trek Session 9.9, 2018 Specialized Demo I Alloy.
Where each sits in its class
Trek Session 9.9Specialized Demo I Alloy
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 I Alloy8 I Alloy |
|---|---|---|
| Frame | Trek OCLV | not listed |
| Fork | Fox 40 Factory | RockShox BoXXer Team 27.5 |
| Shifter | Shimano Saint | SRAM X-7 |
| Derailleur | Shimano Saint | SRAM GX |
| Cassette | Shimano Ultegra | SRAM PG-1030 |
| Chain | Shimano XTR | SRAM PC-1031 |
| Crankset | Shimano Saint | SRAM Descendant |
| Pedals | Wellgo MG-1 | Specialized Bennies |
| Wheelset | DT Swiss FR1950 Gravity Classic | not listed |
| Tire | Bontrager G4 Team Issue | Specialized Butcher |
| Brake | Shimano Saint | SRAM Guide R |
| Handlebar | Bontrager Rhythm | not listed |
| Headset | Cane Creek IS-3 | not listed |
| Seatpost | Bontrager Rhythm Elite | not listed |
| Saddle | Bontrager Evoke 3 | Specialized Phenom Comp |
| Rear shock | not listed | Fox Van RC |
| Stem | not listed | Specialized two-piece |
| Grips | not listed | Specialized Sip Grip |
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