2016 Specialized Demo vs 2018 Trek Session C 27.5 Frameset
The L is the Trek Session C 27.5 Frameset size closest to your L Specialized Demo. 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 Specialized Demo in L, the Trek Session C 27.5 Frameset in L places the top of the head tube at about the same height and 10 mm further forward, relative to the bottom bracket. Its wheelbase is 28 mm longer, which can contribute to stability at speed.
- Frame stack
- +2 mm
- About the same height
- Frame reach
- +10 mm
- Longer frame reach
- Wheelbase
- +28 mm
- Longer: steadier at speed
- Head angle
- ±0.0°
- About the same head angle
- Chainstays
- +15 mm
- Longer: more planted
The two frames
Only the Specialized Demo is drawn. The Trek Session C 27.5 Frameset numbers we have for size L are missing the seat angle.
Geometry side by side
| Measurement | Specialized Demo L | Trek Session C 27.5 Frameset L | Difference |
|---|---|---|---|
| Reach | 440 | 450 | +10 mm |
| Stack | 614 | 616 | +2 mm |
| Head tube angle | 63.5 | 63.5° | ±0.0° |
| Seat tube angle | 74 | not listed | |
| Effective top tube | 616 | 606 | −10 mm |
| Chainstay length | 430 | 445 | +15 mm |
| Wheelbase | 1228 | 1256 | +28 mm |
| BB drop | 12 | 20 | +8 mm |
| BB height | 342 | 356 | +14 mm |
| Standover | 698 | 746 | +48 mm |
| Seat tube length | 419 | 456 | +37 mm |
| Head tube length | 105 | 115 | +10 mm |
Differences are the Trek Session C 27.5 Frameset minus the Specialized Demo. Full charts: 2016 Specialized Demo, 2018 Trek Session C 27.5 Frameset.
Where each sits in its class
Specialized DemoTrek 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 | Specialized DemoS-Works 8 | Trek Session C 27.5 Frameset27.5 Frameset |
|---|---|---|
| Fork | RockShox Boxxer Team | not listed |
| Shifter | SRAM X01 DH | not listed |
| Derailleur | SRAM X01 DH | not listed |
| Cassette | SRAM X01 DH | not listed |
| Chain | SRAM PC-1130 | not listed |
| Crankset | SRAM X0 DH | not listed |
| Bottom bracket | SRAM BB30 | not listed |
| Pedals | Specialized Boomslang | not listed |
| Tire | Specialized Butcher DH, Specialized Slaughter DH | not listed |
| Hub | DT Swiss Star Ratchet | not listed |
| Rim | Roval 650b | not listed |
| Brake | SRAM Guide RS | not listed |
| Handlebar | S Works DH | not listed |
| Stem | Specialized P.Series | not listed |
| Grips | Specialized Sip Grip | not listed |
| Seatpost | Thomson alloy | not listed |
| Saddle | Specialized Phenom Expert | not listed |
| Frame | not listed | Trek OCLV |
| Headset | not listed | FSA Orbit |
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