2019 Specialized Epic vs 2018 Trek Superfly
The 24" kids' is the Trek Superfly size closest to your XL 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 XL, the Trek Superfly in 24" kids' places the top of the head tube 150 mm lower and 102 mm further back, relative to the bottom bracket. Its wheelbase is 197 mm shorter, which can contribute to quicker direction changes.
- Frame stack
- −150 mm
- Lower front end
- Frame reach
- −102 mm
- Shorter frame reach
- Wheelbase
- −197 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 XL | Trek Superfly 24" kids' | Difference |
|---|---|---|---|
| Reach | 475mm | 373 | −102 mm |
| Stack | 630mm | 480 | −150 mm |
| Head tube angle | 69.5° | 70.0° | +0.5° |
| Seat tube angle | 74.75° | not listed | |
| Effective top tube | 647mm | 529 | −118 mm |
| Chainstay length | 438mm | not listed | |
| Wheelbase | 1177mm | 980 | −197 mm |
| BB drop | 38.9mm | 38 | −1 mm |
| BB height | 332mm | not listed | |
| Standover | 799mm | 606 | −193 mm |
| Seat tube length | 520mm | 290 | −230 mm |
| Fork length | 506mm | not listed | |
| Head tube length | 140mm | 105 | −35 mm |
Differences are the Trek Superfly minus the Specialized Epic. Full charts: 2019 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 | Trek Superfly20 |
|---|---|---|
| Rear shock | RockShox Brain shock | not listed |
| Frame | not listed | Trek Dialed |
| 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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