2019 Specialized Fatboy Comp Carbon vs 2021 Trek Farley
The XL is the Trek Farley size closest to your XL Specialized Fatboy Comp Carbon. 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 Farley
Compared with the Specialized Fatboy Comp Carbon in XL, the Trek Farley in XL places the top of the head tube 13 mm lower and 4 mm further back, relative to the bottom bracket. Its wheelbase is 10 mm longer, which can contribute to stability at speed.
- Frame stack
- −13 mm
- Lower front end
- Frame reach
- −4 mm
- Shorter frame reach
- Wheelbase
- +10 mm
- Longer: steadier at speed
- Head angle
- −1.5°
- Slacker: calmer steering
- Chainstays
- ±0 mm
- About the same
The two frames
Specialized Fatboy Comp Carbon, XLTrek Farley, XLDrawn to scale and lined up at the bottom bracket.
Geometry side by side
| Measurement | Specialized Fatboy Comp Carbon XL | Trek Farley XL | Difference |
|---|---|---|---|
| Reach | 458mm | 454 | −4 mm |
| Stack | 632mm | 619 | −13 mm |
| Head tube angle | 70.5° | 69.0° | −1.5° |
| Seat tube angle | 73° | 73.0° | ±0.0° |
| Effective top tube | 651mm | 644 | −7 mm |
| Chainstay length | 455mm | 455 | ±0 mm |
| Wheelbase | 1161mm | 1171 | +10 mm |
| BB drop | 60mm | 67 | +7 mm |
| BB height | 307mm | 321 | +14 mm |
| Standover | 807.5mm | 817 | +10 mm |
| Seat tube length | 520mm | 521 | +1 mm |
| Fork length | 496mm | not listed | |
| Head tube length | 125mm | 120 | −5 mm |
Differences are the Trek Farley minus the Specialized Fatboy Comp Carbon. Full charts: 2019 Specialized Fatboy Comp Carbon, 2021 Trek Farley.
Where each sits in its class
Specialized Fatboy Comp CarbonTrek Farley
Each bike is ranked against the other fat 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 Fatboy Comp CarbonComp Carbon | Trek Farley5 |
|---|---|---|
| Shifter | SRAM GX Eagle | Shimano Deore M4100 |
| Derailleur | SRAM GX Eagle | Shimano Deore M5120 |
| Cassette | SRAM GX Eagle | Shimano Deore M4100 |
| Chain | SRAM GX Eagle | KMC X10 |
| Crankset | Race Face Next | not listed |
| Tire | Specialized Ground Control Fat | Bontrager Gnarwhal Team Issue |
| Hub | Specialized Stout Pro 150, Specialized Stout Pro 197 | not listed |
| Rim | Specialized Stout XC 80 | Trek SUNRingle Mulefut 80 SL |
| Brake | SRAM Level TL | not listed |
| Handlebar | Specialized Stout | not listed |
| Grips | Specialized Sip Grip | not listed |
| Saddle | Specialized Phenom Comp | Bontrager Arvada |
| Frame | not listed | Trek Alpha Platinum |
| Fork | not listed | Bontrager Haru |
| Pedals | not listed | VP 536 |
| Headset | not listed | FSA IS2 |
| Seatpost | not listed | TranzX JD-YSP18 |
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