2018 Trek Superfly vs 2020 Specialized Epic
The S is the Specialized Epic size closest to your 24" kids' Trek Superfly. 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
Compared with the Trek Superfly in 24" kids', the Specialized Epic in S places the top of the head tube 108 mm higher and 35 mm further forward, relative to the bottom bracket. Its wheelbase is 114 mm longer, which can contribute to stability at speed.
- Frame stack
- +108 mm
- Higher front end
- Frame reach
- +35 mm
- Longer frame reach
- Wheelbase
- +114 mm
- Longer: steadier at speed
- Head angle
- −0.5°
- Slacker: calmer steering
- Chainstays
- n/a
- One of the bikes has no number for this
The two frames
We can't draw these frames yet. The Trek Superfly numbers we have for size 24" kids' are missing the seat angle and chainstay length. The numbers below still compare.
Geometry side by side
| Measurement | Trek Superfly 24" kids' | Specialized Epic S | Difference |
|---|---|---|---|
| Reach | 373 | 408mm | +35 mm |
| Stack | 480 | 588mm | +108 mm |
| Head tube angle | 70.0° | 69.5° | −0.5° |
| Effective top tube | 529 | not listed | |
| Wheelbase | 980 | 1094mm | +114 mm |
| BB drop | 38 | 38.9mm | +1 mm |
| Standover | 606 | 764mm | +158 mm |
| Seat tube length | 290 | 400mm | +110 mm |
| Head tube length | 105 | 95mm | −10 mm |
| Seat tube angle | not listed | 74.75° | |
| Chainstay length | not listed | 438mm | |
| BB height | not listed | 332mm | |
| Fork length | not listed | 506mm |
Differences are the Specialized Epic minus the Trek Superfly. Full charts: 2018 Trek Superfly, 2020 Specialized Epic.
Where each sits in its class
Trek SuperflySpecialized Epic
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 Superfly20 | Specialized EpicS-Works AXS |
|---|---|---|
| Frame | Trek Dialed | not listed |
| Fork | Trek Dialed 20 | RockShox SID Brain Ultimate |
| Shifter | Shimano Tourney RS35 | SRAM AXS Eagle Controller |
| Derailleur | Shimano Tourney TY300 | SRAM XX1 Eagle AXS |
| Cassette | Trek SunRun | SRAM XX1 Eagle |
| Chain | KMC Z-50 | SRAM XX1 Eagle |
| Wheelset | Formula F21 | Roval Control SL |
| Tire | Bontrager XR1 | Specialized Fast Trak |
| Hub | Formula FM21, Formula FM31 | not listed |
| Saddle | Trek Dialed 20 | Specialized S-Works Power |
| Rear shock | not listed | RockShox Brain shock |
| Crankset | not listed | Quarq XX1 Eagle Power Meter |
| Bottom bracket | not listed | SRAM DUB |
| Pedals | not listed | Specialized PROVIDED BY |
| Brake | not listed | SRAM Ultimate |
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