2015 Trek X-Caliber vs 2017 Specialized Epic FSR Comp
The S is the Specialized Epic FSR Comp size closest to your S Trek X-Caliber. 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 Epic FSR Comp
Compared with the Trek X-Caliber in S, the Specialized Epic FSR Comp in S places the top of the head tube at about the same height and 12 mm further forward, relative to the bottom bracket. Its wheelbase is 16 mm longer, which can contribute to stability at speed.
- Frame stack
- +2 mm
- About the same height
- Frame reach
- +12 mm
- Longer frame reach
- Wheelbase
- +16 mm
- Longer: steadier at speed
- Head angle
- +1.2°
- Steeper: sharper steering
- Chainstays
- +10 mm
- Longer: more planted
The two frames
Trek X-Caliber, SSpecialized Epic FSR Comp, SDrawn to scale and lined up at the bottom bracket.
Geometry side by side
| Measurement | Trek X-Caliber S | Specialized Epic FSR Comp S | Difference |
|---|---|---|---|
| Reach | 381 | 393mm | +12 mm |
| Stack | 585 | 587mm | +2 mm |
| Head tube angle | 69.3° | 70.5° | +1.2° |
| Seat tube angle | 73.0° | 74° | +1.0° |
| Effective top tube | 560 | 568mm | +8 mm |
| Chainstay length | 438 | 448mm | +10 mm |
| Wheelbase | 1066 | 1082mm | +16 mm |
| BB drop | 48 | 40mm | −8 mm |
| BB height | 306 | 332mm | +26 mm |
| Standover | 745 | 776mm | +31 mm |
| Seat tube length | 394 | 400mm | +6 mm |
| Head tube length | 100 | 100mm | ±0 mm |
| Fork length | not listed | 506mm |
Differences are the Specialized Epic FSR Comp minus the Trek X-Caliber. Full charts: 2015 Trek X-Caliber, 2017 Specialized Epic FSR Comp.
Where each sits in its class
Trek X-CaliberSpecialized Epic FSR 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-Caliber6 | Specialized Epic FSR CompFSR Comp |
|---|---|---|
| Frame | Trek Alpha Gold | not listed |
| Fork | SR Suntour XCM | RockShox Reba RL |
| Shifter | SRAM X4 | Shimano SLX M7000 |
| Derailleur | SRAM X4 | Shimano SLX M7025, Shimano XT M8000 |
| Cassette | SRAM PG920 | Shimano SLX M7000 |
| Chain | KMC X9 | KMC X11 EL |
| Crankset | Shimano Acera M371 | Race Face Aeffect |
| Tire | Bontrager XR1 | Specialized Fast Trak |
| Hub | Formula DC20, Formula DC22 | not listed |
| Rim | Bontrager AT-650 | Roval Control |
| Brake | Shimano Acera M355 | Shimano Deore M506 |
| Seatpost | Bontrager SSR | not listed |
| Saddle | Bontrager Evoke 1.5 | Specialized Phenom Comp |
| Rear shock | not listed | Fox Epic |
| Grips | not listed | Specialized Sip Grip |
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