2020 Specialized Fatboy vs 2022 Trek Farley AL Frameset
The XL is the Trek Farley AL Frameset size closest to your XL Specialized Fatboy. 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 AL Frameset
Compared with the Specialized Fatboy in XL, the Trek Farley AL Frameset 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
- −2.0°
- Slacker: calmer steering
- Chainstays
- ±0 mm
- About the same
The two frames
Specialized Fatboy, XLTrek Farley AL Frameset, XLDrawn to scale and lined up at the bottom bracket.
Geometry side by side
| Measurement | Specialized Fatboy XL | Trek Farley AL Frameset XL | Difference |
|---|---|---|---|
| Reach | 458mm | 454 | −4 mm |
| Stack | 632mm | 619 | −13 mm |
| Head tube angle | 71° | 69.0° | −2.0° |
| Seat tube angle | 73mm | 73.0° | ±0.0° |
| Chainstay length | 455mm | 455 | ±0 mm |
| Wheelbase | 1161mm | 1171 | +10 mm |
| BB drop | 60mm | 67 | +7 mm |
| BB height | 312mm | 321 | +9 mm |
| Standover | 847mm | 817 | −30 mm |
| Seat tube length | 520mm | 521 | +1 mm |
| Fork length | 496mm | not listed | |
| Head tube length | 125mm | 120 | −5 mm |
| Effective top tube | not listed | 644 |
Differences are the Trek Farley AL Frameset minus the Specialized Fatboy. Full charts: 2020 Specialized Fatboy, 2022 Trek Farley AL Frameset.
Where each sits in its class
Specialized FatboyTrek Farley AL Frameset
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 Farley AL FramesetAL Frameset |
|---|---|---|
| Shifter | SRAM SX Eagle | not listed |
| Derailleur | SRAM SX Eagle | not listed |
| Chain | SRAM SX Eagle | not listed |
| Crankset | SRAM X01 Eagle | not listed |
| Tire | Maxxis Minion FBF, Maxxis Minion FBR | not listed |
| Hub | Specialized Stout Pro 150, Specialized Stout Pro 197 | not listed |
| Rim | Specialized Stout XC 80 | not listed |
| Brake | SRAM T | not listed |
| Handlebar | Specialized Stout | not listed |
| Grips | Specialized Sip Grip | not listed |
| Saddle | Specialized Bridge | not listed |
| Frame | not listed | Trek Alpha Platinum |
| Fork | not listed | Bontrager Haru |
| Headset | not listed | FSA IS2 |
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