2015 Specialized Demo 8 Frameset vs 2017 Specialized Demo Alloy
The EXTRA LONG is the Specialized Demo Alloy size closest to your X-long Specialized Demo 8 Frameset. 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 Specialized Demo Alloy
Compared with the Specialized Demo 8 Frameset in X-long, the Specialized Demo Alloy in EXTRA LONG places the top of the head tube 9 mm lower and about as far forward, relative to the bottom bracket. Its wheelbase is 5 mm shorter, which can contribute to quicker direction changes.
- Frame stack
- −9 mm
- Lower front end
- Frame reach
- ±0 mm
- About the same reach
- Wheelbase
- −5 mm
- Shorter: quicker to change direction
- Head angle
- ±0.0°
- About the same head angle
- Chainstays
- ±0 mm
- About the same
The two frames
We can't draw these frames yet. The Specialized Demo 8 Frameset numbers we have for size X-long are missing the seat angle. The numbers below still compare.
Geometry side by side
| Measurement | Specialized Demo 8 Frameset X-long | Specialized Demo Alloy EXTRA LONG | Difference |
|---|---|---|---|
| Reach | 460mm | 460mm | ±0 mm |
| Stack | 623mm | 614mm | −9 mm |
| Head tube angle | 63.5° | 63.5° | ±0.0° |
| Effective top tube | 633mm | 636mm | +3 mm |
| Chainstay length | 430mm | 430mm | ±0 mm |
| Wheelbase | 1253mm | 1248mm | −5 mm |
| BB height | 343mm | 342mm | −1 mm |
| Standover | 718mm | 698mm | −20 mm |
| Seat tube length | 419mm | 367mm | −52 mm |
| Seat tube angle | not listed | 74° | |
| BB drop | not listed | 12mm | |
| Head tube length | not listed | 105mm |
Differences are the Specialized Demo Alloy minus the Specialized Demo 8 Frameset. Full charts: 2015 Specialized Demo 8 Frameset, 2017 Specialized Demo Alloy.
Where each sits in its class
Specialized Demo 8 FramesetSpecialized Demo 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 | Specialized Demo 8 FramesetS-Works Frameset | Specialized Demo Alloy8 Alloy |
|---|---|---|
| Rear shock | Öhlins TTX22M | Öhlins TTX |
Know what is on every bike.
Add your bike to Quiver. Keep its parts, setup, and service history together, then share your build.
Explore the app
