2019 Specialized Fatboy vs 2021 Trek Farley
The Trek Farley size closest to your M is the M. Compare the M instead
What changes on the Trek Farley
Compared with the Specialized Fatboy in M, the Trek Farley in XL places the top of the head tube 17 mm higher and 34 mm further forward, relative to the bottom bracket. Its wheelbase is 58 mm longer, which can contribute to stability at speed.
- Frame stack
- +17 mm
- Higher front end
- Frame reach
- +34 mm
- Longer frame reach
- Wheelbase
- +58 mm
- Longer: steadier at speed
- Head angle
- −2.0°
- Slacker: calmer steering
- Chainstays
- ±0 mm
- About the same
The two frames
Specialized Fatboy, MTrek Farley, XLDrawn to scale and lined up at the bottom bracket.
Geometry side by side
| Measurement | Specialized Fatboy M | Trek Farley XL | Difference |
|---|---|---|---|
| Reach | 420mm | 454 | +34 mm |
| Stack | 602mm | 619 | +17 mm |
| Head tube angle | 71° | 69.0° | −2.0° |
| Seat tube angle | 73mm | 73.0° | ±0.0° |
| Effective top tube | 604mm | 644 | +40 mm |
| Chainstay length | 455mm | 455 | ±0 mm |
| Wheelbase | 1113mm | 1171 | +58 mm |
| BB drop | 60mm | 67 | +7 mm |
| BB height | 316mm | 321 | +5 mm |
| Standover | 786mm | 817 | +31 mm |
| Seat tube length | 434mm | 521 | +87 mm |
| Fork length | 496mm | not listed | |
| Head tube length | 94mm | 120 | +26 mm |
Differences are the Trek Farley minus the Specialized Fatboy. Full charts: 2019 Specialized Fatboy, 2021 Trek Farley.
Where each sits in its class
Specialized FatboyTrek 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 FatboyFatboy | Trek Farley5 |
|---|---|---|
| Shifter | SRAM NX | Shimano Deore M4100 |
| Derailleur | SRAM NX | Shimano Deore M5120 |
| Cassette | SRAM PG-1130 | Shimano Deore M4100 |
| Chain | KMC X11 EPT | KMC X10 |
| 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 T | not listed |
| Handlebar | Specialized Stout | not listed |
| Grips | Specialized Sip Grip | not listed |
| Saddle | Specialized Henge 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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