2021 Specialized Rockhopper Comp vs 2019 Trek X-Caliber Frameset
The M is the Trek X-Caliber Frameset size closest to your S Specialized Rockhopper Comp. 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 X-Caliber Frameset
Compared with the Specialized Rockhopper Comp in S, the Trek X-Caliber Frameset in M places the top of the head tube 7 mm lower and 11 mm further forward, relative to the bottom bracket. Its wheelbase is 5 mm longer, which can contribute to stability at speed.
- Frame stack
- −7 mm
- Lower front end
- Frame reach
- +11 mm
- Longer frame reach
- Wheelbase
- +5 mm
- Longer: steadier at speed
- Head angle
- +0.8°
- Steeper: sharper steering
- Chainstays
- −2 mm
- About the same
The two frames
Only the Specialized Rockhopper Comp is drawn. The Trek X-Caliber Frameset numbers we have for size M are missing the seat angle.
Geometry side by side
| Measurement | Specialized Rockhopper Comp S | Trek X-Caliber Frameset M | Difference |
|---|---|---|---|
| Reach | 405 | 416 | +11 mm |
| Stack | 607 | 600 | −7 mm |
| Head tube angle | 68.5 | 69.3° | +0.8° |
| Seat tube angle | 73.5 | not listed | |
| Chainstay length | 440 | 438 | −2 mm |
| Wheelbase | 1105 | 1110 | +5 mm |
| Standover | 732mm | 743 | +11 mm |
| Seat tube length | 360mm | 419 | +59 mm |
| Fork length | 505mm | not listed | |
| Head tube length | 95mm | 90 | −5 mm |
| Effective top tube | not listed | 598 | |
| BB drop | not listed | 58 | |
| BB height | not listed | 316 |
Differences are the Trek X-Caliber Frameset minus the Specialized Rockhopper Comp. Full charts: 2021 Specialized Rockhopper Comp, 2019 Trek X-Caliber Frameset.
Where each sits in its class
Specialized Rockhopper CompTrek X-Caliber Frameset
Each bike is ranked against the other XC 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 Rockhopper Comp | Trek X-Caliber FramesetX-Caliber Frameset |
|---|---|---|
| Frame | not listed | Trek Alpha Gold |
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