2018 Specialized Epic Men's Ultralight vs 2018 Trek Superfly
The 24" kids' is the Trek Superfly size closest to your M Specialized Epic Men's Ultralight. 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
Compared with the Specialized Epic Men's Ultralight in M, the Trek Superfly in 24" kids' places the top of the head tube 117 mm lower and 60 mm further back, relative to the bottom bracket. Its wheelbase is 143 mm shorter, which can contribute to quicker direction changes.
- Frame stack
- −117 mm
- Lower front end
- Frame reach
- −60 mm
- Shorter frame reach
- Wheelbase
- −143 mm
- Shorter: quicker to change direction
- Head angle
- +0.5°
- Steeper: sharper steering
- Chainstays
- n/a
- One of the bikes has no number for this
The two frames
Only the Specialized Epic Men's Ultralight is drawn. The Trek Superfly numbers we have for size 24" kids' are missing the seat angle and chainstay length.
Geometry side by side
| Measurement | Specialized Epic Men's Ultralight M | Trek Superfly 24" kids' | Difference |
|---|---|---|---|
| Reach | 433mm | 373 | −60 mm |
| Stack | 597mm | 480 | −117 mm |
| Head tube angle | 69.5° | 70.0° | +0.5° |
| Seat tube angle | 74.75° | not listed | |
| Effective top tube | 595mm | 529 | −66 mm |
| Chainstay length | 438mm | not listed | |
| Wheelbase | 1123mm | 980 | −143 mm |
| BB drop | 38.9mm | 38 | −1 mm |
| BB height | 332.6mm | not listed | |
| Standover | 770mm | 606 | −164 mm |
| Seat tube length | 434mm | 290 | −144 mm |
| Fork length | 506mm | not listed | |
| Head tube length | 105mm | 105 | ±0 mm |
Differences are the Trek Superfly minus the Specialized Epic Men's Ultralight. Full charts: 2018 Specialized Epic Men's Ultralight, 2018 Trek Superfly.
Where each sits in its class
Specialized Epic Men's UltralightTrek Superfly
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 Men's UltralightMen's S-Works Ultralight | Trek Superfly20 |
|---|---|---|
| Frame | Specialized S-Works Epic | Trek Dialed |
| Rear shock | RockShox Brain shock | not listed |
| Fork | not listed | Trek Dialed 20 |
| Shifter | not listed | Shimano Tourney RS35 |
| Derailleur | not listed | Shimano Tourney TY300 |
| Cassette | not listed | Trek SunRun |
| Chain | not listed | KMC Z-50 |
| Wheelset | not listed | Formula F21 |
| Tire | not listed | Bontrager XR1 |
| Hub | not listed | Formula FM21, Formula FM31 |
| Saddle | not listed | Trek Dialed 20 |
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