2017 Specialized Epic FSR vs 2015 Trek Superfly 9.8 SL
The XXL is the Trek Superfly 9.8 SL size closest to your XL Specialized Epic FSR. 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 Superfly 9.8 SL
Compared with the Specialized Epic FSR in XL, the Trek Superfly 9.8 SL in XXL places the top of the head tube 17 mm lower and about as far forward, relative to the bottom bracket.
- Frame stack
- −17 mm
- Lower front end
- Frame reach
- ±0 mm
- About the same reach
- Wheelbase
- +1 mm
- About the same
- Head angle
- −0.9°
- Slacker: calmer steering
- Chainstays
- −3 mm
- Shorter: livelier
The two frames
Only the Specialized Epic FSR is drawn. The Trek Superfly 9.8 SL numbers we have for size XXL are missing the seat angle.
Geometry side by side
| Measurement | Specialized Epic FSR XL | Trek Superfly 9.8 SL XXL | Difference |
|---|---|---|---|
| Reach | 462mm | 462 | ±0 mm |
| Stack | 634mm | 617 | −17 mm |
| Head tube angle | 70.5° | 69.6° | −0.9° |
| Seat tube angle | 74° | not listed | |
| Effective top tube | 647mm | 663 | +16 mm |
| Chainstay length | 448mm | 445 | −3 mm |
| Wheelbase | 1168mm | 1169 | +1 mm |
| BB drop | 40mm | 53 | +13 mm |
| BB height | 332mm | 316 | −16 mm |
| Standover | 793mm | 844 | +51 mm |
| Seat tube length | 520mm | 545 | +25 mm |
| Fork length | 506mm | not listed | |
| Head tube length | 140mm | 118 | −22 mm |
Differences are the Trek Superfly 9.8 SL minus the Specialized Epic FSR. Full charts: 2017 Specialized Epic FSR, 2015 Trek Superfly 9.8 SL.
Where each sits in its class
Specialized Epic FSRTrek Superfly 9.8 SL
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 Epic FSRS-Works FSR | Trek Superfly 9.8 SL9.8 SL |
|---|---|---|
| Rear shock | Fox Epic | not listed |
| Frame | not listed | Trek OCLV |
| Fork | not listed | Fox Performance |
| Shifter | not listed | SRAM X1 |
| Derailleur | not listed | SRAM X01 |
| Cassette | not listed | SRAM XG 1180 |
| Chain | not listed | SRAM PC-1130 |
| Crankset | not listed | SRAM X1 1400 X-Sync |
| Wheelset | not listed | DT Swiss X1700 |
| Tire | not listed | Bontrager XR1 Team Issue |
| Brake | not listed | Shimano Deore XT |
| Headset | not listed | FSA IS2 |
| Seatpost | not listed | Bontrager Rhythm Elite |
| Saddle | not listed | Bontrager Evoke RXL |
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