2018 Specialized Demo 8 Frameset vs 2020 Trek Session C 27.5 Frameset
The Trek Session C 27.5 Frameset size closest to your SHORT is the S. Compare the S instead
What changes on the Trek Session C 27.5 Frameset
Compared with the Specialized Demo 8 Frameset in SHORT, the Trek Session C 27.5 Frameset in XL places the top of the head tube at about the same height and 80 mm further forward, relative to the bottom bracket. Its wheelbase is 98 mm longer, which can contribute to stability at speed.
- Frame stack
- +2 mm
- About the same height
- Frame reach
- +80 mm
- Longer frame reach
- Wheelbase
- +98 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 8 Frameset is drawn. The Trek Session C 27.5 Frameset numbers we have for size XL are missing the seat angle.
Geometry side by side
| Measurement | Specialized Demo 8 Frameset SHORT | Trek Session C 27.5 Frameset XL | Difference |
|---|---|---|---|
| Reach | 395mm | 475 | +80 mm |
| Stack | 614mm | 616 | +2 mm |
| Head tube angle | 63.5° | 63.5° | ±0.0° |
| Seat tube angle | 74° | not listed | |
| Effective top tube | 571mm | 631 | +60 mm |
| Chainstay length | 430mm | 445 | +15 mm |
| Wheelbase | 1183mm | 1281 | +98 mm |
| BB drop | 12mm | 20 | +8 mm |
| BB height | 342mm | 356 | +14 mm |
| Standover | 698mm | 748 | +50 mm |
| Seat tube length | 367mm | 456 | +89 mm |
| Fork length | 590mm | not listed | |
| Head tube length | 105mm | 115 | +10 mm |
Differences are the Trek Session C 27.5 Frameset minus the Specialized Demo 8 Frameset. Full charts: 2018 Specialized Demo 8 Frameset, 2020 Trek Session C 27.5 Frameset.
Where each sits in its class
Specialized Demo 8 FramesetTrek 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 Demo 8 FramesetS-Works Frameset | Trek Session C 27.5 Frameset27.5 Frameset |
|---|---|---|
| Rear shock | Öhlins TTX | not listed |
| Frame | not listed | Trek OCLV |
| Headset | not listed | FSA Orbit |
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