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 EXTRA LONG places the top of the head tube 11 mm higher and 52 mm further forward, relative to the bottom bracket. Its wheelbase is 43 mm longer, which can contribute to stability at speed.
- Frame stack
- +11 mm
- Higher front end
- Frame reach
- +52 mm
- Longer frame reach
- Wheelbase
- +43 mm
- Longer: steadier at speed
- 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 EXTRA LONG | Difference |
|---|---|---|---|
| Reach | 408 | 460mm | +52 mm |
| Stack | 603 | 614mm | +11 mm |
| Head tube angle | 64.2° | 63.5° | −0.7° |
| Effective top tube | 590 | 636mm | +46 mm |
| Chainstay length | 443 | 430mm | −13 mm |
| Wheelbase | 1205 | 1248mm | +43 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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