2017 Trek Superfly vs 2019 Trek X-Caliber
The XS is the Trek X-Caliber 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 Trek X-Caliber
Compared with the Trek Superfly in 24" kids', the Trek X-Caliber in XS places the top of the head tube 86 mm higher and about as far forward, relative to the bottom bracket. Its wheelbase is 56 mm longer, which can contribute to stability at speed.
- Frame stack
- +86 mm
- Higher front end
- Frame reach
- +2 mm
- About the same reach
- Wheelbase
- +56 mm
- Longer: steadier at speed
- Head angle
- −0.8°
- 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' | Trek X-Caliber XS | Difference |
|---|---|---|---|
| Reach | 373 | 375 | +2 mm |
| Stack | 480 | 566 | +86 mm |
| Head tube angle | 70.0° | 69.2° | −0.8° |
| Seat tube angle | not listed | not listed | |
| Effective top tube | 529 | 538 | +9 mm |
| Chainstay length | not listed | 425 | |
| Wheelbase | 980 | 1036 | +56 mm |
| BB drop | 38 | 58 | +20 mm |
| BB height | not listed | 296 | |
| Standover | 606 | 708 | +102 mm |
| Seat tube length | 290 | 343 | +53 mm |
| Head tube length | 105 | 90 | −15 mm |
Differences are the Trek X-Caliber minus the Trek Superfly. Full charts: 2017 Trek Superfly, 2019 Trek X-Caliber.
Where each sits in its class
Trek SuperflyTrek X-Caliber
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 Superfly16 | Trek X-Caliber7 |
|---|---|---|
| Frame | Trek Dialed | Trek Alpha Gold |
| Chain | Trek Clarks C410 | KMC X9 |
| Shifter | not listed | Shimano Acera M3000 |
| Derailleur | not listed | Shimano Deore M4020, Shimano Acera M3000 |
| Cassette | not listed | Shimano HG200 |
| Crankset | not listed | Shimano Acera MT210 |
| Pedals | not listed | VP 536 |
| Tire | not listed | Bontrager XR2 |
| Hub | not listed | Formula DC20, Formula DC2241 |
| Rim | not listed | Bontrager Connection |
| Brake | not listed | Shimano MT200 |
| Saddle | not listed | Bontrager Arvada |
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