2020 Specialized Epic vs 2018 Trek Superfly
The 24" kids' is the Trek Superfly size closest to your L Specialized Epic. 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 in L, the Trek Superfly in 24" kids' places the top of the head tube 131 mm lower and 83 mm further back, relative to the bottom bracket. Its wheelbase is 171 mm shorter, which can contribute to quicker direction changes.
- Frame stack
- −131 mm
- Lower front end
- Frame reach
- −83 mm
- Shorter frame reach
- Wheelbase
- −171 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 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 L | Trek Superfly 24" kids' | Difference |
|---|---|---|---|
| Reach | 456mm | 373 | −83 mm |
| Stack | 611mm | 480 | −131 mm |
| Head tube angle | 69.5° | 70.0° | +0.5° |
| Seat tube angle | 74.75° | not listed | |
| Chainstay length | 438mm | not listed | |
| Wheelbase | 1151mm | 980 | −171 mm |
| BB drop | 38.9mm | 38 | −1 mm |
| BB height | 332mm | not listed | |
| Standover | 776mm | 606 | −170 mm |
| Seat tube length | 470mm | 290 | −180 mm |
| Fork length | 506mm | not listed | |
| Head tube length | 120mm | 105 | −15 mm |
| Effective top tube | not listed | 529 |
Differences are the Trek Superfly minus the Specialized Epic. Full charts: 2020 Specialized Epic, 2018 Trek Superfly.
Where each sits in its class
Specialized EpicTrek 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 EpicS-Works AXS | Trek Superfly20 |
|---|---|---|
| Fork | RockShox SID Brain Ultimate | Trek Dialed 20 |
| Rear shock | RockShox Brain shock | not listed |
| Shifter | SRAM AXS Eagle Controller | Shimano Tourney RS35 |
| Derailleur | SRAM XX1 Eagle AXS | Shimano Tourney TY300 |
| Cassette | SRAM XX1 Eagle | Trek SunRun |
| Chain | SRAM XX1 Eagle | KMC Z-50 |
| Crankset | Quarq XX1 Eagle Power Meter | not listed |
| Bottom bracket | SRAM DUB | not listed |
| Pedals | Specialized PROVIDED BY | not listed |
| Wheelset | Roval Control SL | Formula F21 |
| Tire | Specialized Fast Trak | Bontrager XR1 |
| Brake | SRAM Ultimate | not listed |
| Saddle | Specialized S-Works Power | Trek Dialed 20 |
| Frame | not listed | Trek Dialed |
| Hub | not listed | Formula FM21, Formula FM31 |
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