2019 Trek Session C 27.5 Frameset vs 2018 Specialized Demo 8 Frameset
The Specialized Demo 8 Frameset size closest to your M is the M. Compare the M instead
What changes on the Specialized Demo 8 Frameset
Compared with the Trek Session C 27.5 Frameset in M, the Specialized Demo 8 Frameset in EXTRA LONG places the top of the head tube at about the same height and 31 mm further forward, relative to the bottom bracket. Its wheelbase is 13 mm longer, which can contribute to stability at speed.
- Frame stack
- −2 mm
- About the same height
- Frame reach
- +31 mm
- Longer frame reach
- Wheelbase
- +13 mm
- Longer: steadier at speed
- Head angle
- ±0.0°
- About the same head angle
- Chainstays
- −15 mm
- Shorter: livelier
The two frames
We can't draw these frames yet. The Trek Session C 27.5 Frameset numbers we have for size M are missing the seat angle. The numbers below still compare.
Geometry side by side
| Measurement | Trek Session C 27.5 Frameset M | Specialized Demo 8 Frameset EXTRA LONG | Difference |
|---|---|---|---|
| Reach | 429 | 460mm | +31 mm |
| Stack | 616 | 614mm | −2 mm |
| Head tube angle | 63.5° | 63.5° | ±0.0° |
| Effective top tube | 584 | 636mm | +52 mm |
| Chainstay length | 445 | 430mm | −15 mm |
| Wheelbase | 1235 | 1248mm | +13 mm |
| BB drop | 20 | 12mm | −8 mm |
| BB height | 356 | 342mm | −14 mm |
| Standover | not listed | 698mm | |
| Seat tube length | 425 | 367mm | −58 mm |
| Head tube length | 115 | 105mm | −10 mm |
| Seat tube angle | not listed | 74° | |
| Fork length | not listed | 590mm |
Differences are the Specialized Demo 8 Frameset minus the Trek Session C 27.5 Frameset. Full charts: 2019 Trek Session C 27.5 Frameset, 2018 Specialized Demo 8 Frameset.
Where each sits in its class
Trek Session C 27.5 FramesetSpecialized 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 C 27.5 Frameset27.5 Frameset | Specialized Demo 8 FramesetS-Works Frameset |
|---|---|---|
| Frame | Trek OCLV | not listed |
| Headset | FSA Orbit | not listed |
| Rear shock | not listed | Öhlins TTX |
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