2020 Trek Roscoe vs 2018 Specialized Fuse Sport 6Fattie/29
The XS is the Specialized Fuse Sport 6Fattie/29 size closest to your 20" kids' Trek Roscoe. 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 Fuse Sport 6Fattie/29
Compared with the Trek Roscoe in 20" kids', the Specialized Fuse Sport 6Fattie/29 in XS places the top of the head tube 120 mm higher and 92 mm further forward, relative to the bottom bracket. Its wheelbase is 215 mm longer, which can contribute to stability at speed.
- Frame stack
- +120 mm
- Higher front end
- Frame reach
- +92 mm
- Longer frame reach
- Wheelbase
- +215 mm
- Longer: steadier at speed
- Head angle
- −1.5°
- Slacker: calmer steering
- Chainstays
- +72 mm
- Longer: more planted
The two frames
We can't draw these frames yet. The Trek Roscoe numbers we have for size 20" kids' are missing the seat angle. The numbers below still compare.
Geometry side by side
| Measurement | Trek Roscoe 20" kids' | Specialized Fuse Sport 6Fattie/29 XS | Difference |
|---|---|---|---|
| Reach | 288 | 380mm | +92 mm |
| Stack | 483 | 603mm | +120 mm |
| Head tube angle | 70.0° | 68.5° | −1.5° |
| Seat tube angle | not listed | 73° | |
| Effective top tube | 445 | 553mm | +108 mm |
| Chainstay length | 363 | 435mm | +72 mm |
| Wheelbase | 863 | 1078mm | +215 mm |
| BB drop | 35 | not listed | |
| BB height | 235 | 317mm | +82 mm |
| Standover | 518 | 715mm | +197 mm |
| Seat tube length | 255 | 330mm | +75 mm |
| Head tube length | 115 | 100mm | −15 mm |
| Fork length | not listed | 500mm |
Differences are the Specialized Fuse Sport 6Fattie/29 minus the Trek Roscoe. Full charts: 2020 Trek Roscoe, 2018 Specialized Fuse Sport 6Fattie/29.
Where each sits in its class
Trek RoscoeSpecialized Fuse Sport 6Fattie/29
Each bike is ranked against the other trail 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 Roscoe20 | Specialized Fuse Sport 6Fattie/29Sport 6Fattie/29 |
|---|---|---|
| Frame | Trek Dialed | not listed |
| Fork | Trek Dialed 20 | SR Suntour XCR |
| Shifter | Shimano Acera M310 | SRAM X5 |
| Derailleur | Shimano Tourney TX80 | SRAM GX |
| Cassette | Trek SunRun | not listed |
| Chain | KMC Z51 | SRAM PC-1031 |
| Tire | Trek Cheng-Shin | Specialized Ground Control |
| Hub | Formula DC20, Formula D22 | Specialized Stout 110, Specialized Stout 141 |
| Brake | Tektro M280 | Tektro Gemini |
| Saddle | Trek Dialed 20 | Specialized Henge Sport |
| Crankset | not listed | SRAM NX |
| Rim | not listed | Specialized Stout 38 27.5 |
| Handlebar | not listed | Specialized Stout |
| Grips | not listed | Specialized Sip Grip |
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