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