2027 Trek X-Caliber Frameset vs 2026 Specialized Rockhopper Comp
The M-27.5 is the Specialized Rockhopper Comp size closest to your M Trek X-Caliber 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 Rockhopper Comp
Compared with the Trek X-Caliber Frameset in M, the Specialized Rockhopper Comp in M-27.5 places the top of the head tube 9 mm lower and 3 mm further back, relative to the bottom bracket. Its wheelbase is 9 mm longer, which can contribute to stability at speed.
- Frame stack
- −9 mm
- Lower front end
- Frame reach
- −3 mm
- Shorter frame reach
- Wheelbase
- +9 mm
- Longer: steadier at speed
- Head angle
- −1.5°
- Slacker: calmer steering
- Chainstays
- +2 mm
- About the same
The two frames
Trek X-Caliber Frameset, MSpecialized Rockhopper Comp, M-27.5Drawn to scale and lined up at the bottom bracket.
Geometry side by side
| Measurement | Trek X-Caliber Frameset M | Specialized Rockhopper Comp M-27.5 | Difference |
|---|---|---|---|
| Reach | 418 | 415 | −3 mm |
| Stack | 598 | 589 | −9 mm |
| Head tube angle | 69.5° | 68 | −1.5° |
| Seat tube angle | 73.0° | 73.5 | +0.5° |
| Effective top tube | 601 | 589 | −12 mm |
| Chainstay length | 438 | 440 | +2 mm |
| Wheelbase | 1109 | 1118 | +9 mm |
| BB drop | 58 | 43 | −15 mm |
| BB height | 311 | 310 | −1 mm |
| Standover | 748 | 735 | −13 mm |
| Seat tube length | 419 | 400 | −19 mm |
| Head tube length | 90 | 105 | +15 mm |
Differences are the Specialized Rockhopper Comp minus the Trek X-Caliber Frameset. Full charts: 2027 Trek X-Caliber Frameset, 2026 Specialized Rockhopper Comp.
Where each sits in its class
Trek X-Caliber FramesetSpecialized Rockhopper Comp
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 | Trek X-Caliber Frameset | Specialized Rockhopper CompComp |
|---|---|---|
| Frame | not listed | Specialized Rockhopper |
| Fork | not listed | RockShox Judy Silver Solo Air |
| Shifter | not listed | Shimano Deore M6100 |
| Derailleur | not listed | Shimano Deore M6100 Shadow Plus |
| Cassette | not listed | SunRace 11-51 |
| Chain | not listed | KMC X12EPT |
| Crankset | not listed | Specialized Stout Pro |
| Pedals | not listed | Specialized platform |
| Wheelset | not listed | Formula DC-20 / DC-22 / Specialized Alloy |
| Tire | not listed | Specialized Ground Control 2BR |
| Brake | not listed | Shimano MT200 |
| Handlebar | not listed | Specialized alloy, 9-degree backsweep, 15mm rise, 31.8mm |
| Stem | not listed | Specialized Stout |
| Grips | not listed | Specialized Trail |
| Seatpost | not listed | Alloy, 2-bolt clamp, 30.9mm |
| Saddle | not listed | Specialized Bridge Sport |
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