2021 Specialized Rockhopper Comp vs 2019 Trek X-Caliber
The ML is the Trek X-Caliber size closest to your M 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
Compared with the Specialized Rockhopper Comp in M, the Trek X-Caliber in ML places the top of the head tube 16 mm lower and 7 mm further forward, relative to the bottom bracket.
- Frame stack
- −16 mm
- Lower front end
- Frame reach
- +7 mm
- Longer frame reach
- Wheelbase
- +2 mm
- About the same
- 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 numbers we have for size ML are missing the seat angle.
Geometry side by side
| Measurement | Specialized Rockhopper Comp M | Trek X-Caliber ML | Difference |
|---|---|---|---|
| Reach | 425 | 432 | +7 mm |
| Stack | 616 | 600 | −16 mm |
| Head tube angle | 68.5 | 69.3° | +0.8° |
| Seat tube angle | 73.5 | not listed | |
| Chainstay length | 440 | 438 | −2 mm |
| Wheelbase | 1124 | 1126 | +2 mm |
| Standover | 754mm | 737 | −17 mm |
| Seat tube length | 400mm | 444 | +44 mm |
| Fork length | 515mm | not listed | |
| Head tube length | 95mm | 90 | −5 mm |
| Effective top tube | not listed | 614 | |
| BB drop | not listed | 58 | |
| BB height | not listed | 316 |
Differences are the Trek X-Caliber minus the Specialized Rockhopper Comp. Full charts: 2021 Specialized Rockhopper Comp, 2019 Trek X-Caliber.
Where each sits in its class
Specialized Rockhopper CompTrek X-Caliber
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-Caliber7 |
|---|---|---|
| Frame | not listed | Trek Alpha Gold |
| Shifter | not listed | Shimano Acera M3000 |
| Derailleur | not listed | Shimano Deore M4020, Shimano Acera M3000 |
| Cassette | not listed | Shimano HG200 |
| Chain | not listed | KMC X9 |
| Crankset | not listed | Shimano Acera MT210 |
| Pedals | not listed | VP 536 |
| Tire | not listed | Bontrager XR2 |
| Hub | not listed | Formula DC20, Formula DC2241 |
| Rim | not listed | Bontrager Connection |
| Brake | not listed | Shimano MT200 |
| Saddle | not listed | Bontrager Arvada |
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