2014 Trek Farley vs 2015 Specialized Fatboy SL
The M is the Specialized Fatboy SL size closest to your M Trek Farley. 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 Fatboy SL
Compared with the Trek Farley in M, the Specialized Fatboy SL in M places the top of the head tube 5 mm higher and 9 mm further forward, relative to the bottom bracket. Its wheelbase is 15 mm longer, which can contribute to stability at speed.
- Frame stack
- +5 mm
- Higher front end
- Frame reach
- +9 mm
- Longer frame reach
- Wheelbase
- +15 mm
- Longer: steadier at speed
- Head angle
- +0.5°
- Steeper: sharper steering
- Chainstays
- +15 mm
- Longer: more planted
The two frames
We can't draw these frames yet. The Trek Farley numbers we have for size M are missing the seat angle. The numbers below still compare.
Geometry side by side
| Measurement | Trek Farley M | Specialized Fatboy SL M | Difference |
|---|---|---|---|
| Reach | 411 | 420mm | +9 mm |
| Stack | 595 | 600mm | +5 mm |
| Head tube angle | 70.0° | 70.5° | +0.5° |
| Effective top tube | 593 | 603mm | +10 mm |
| Chainstay length | 440 | 455mm | +15 mm |
| Wheelbase | 1090 | 1105mm | +15 mm |
| BB drop | 55 | 60mm | +5 mm |
| BB height | 313 | 315mm | +2 mm |
| Standover | 782 | 793mm | +11 mm |
| Seat tube length | 419 | 445mm | +26 mm |
| Head tube length | 100 | 120mm | +20 mm |
| Seat tube angle | not listed | 73° |
Differences are the Specialized Fatboy SL minus the Trek Farley. Full charts: 2014 Trek Farley, 2015 Specialized Fatboy SL.
Where each sits in its class
Trek FarleySpecialized Fatboy SL
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 | Trek FarleyFarley | Specialized Fatboy SLSL |
|---|---|---|
| Frame | Trek Alpha Platinum | not listed |
| Shifter | SRAM X7 | SRAM XX1 |
| Derailleur | SRAM X-0, SRAM X-9 | SRAM XX1 |
| Cassette | Shimano HG62 | SRAM XX1 |
| Tire | Trek Surly Knard | Specialized Ground Control Fat |
| Brake | Avid DB 3 | Magura MT8 |
| Headset | FSA IS2 | not listed |
| Seatpost | Bontrager Rhythm Elite | not listed |
| Saddle | Bontrager Evoke 2 | Specialized Phenom Expert |
| Chain | not listed | KMC X11L |
| Crankset | not listed | Race Face Next SL |
| Hub | not listed | Specialized Stout XC 135, Specialized Stout XC 190 |
| Rim | not listed | Hed Big Deal |
| Stem | not listed | Specialized Stout XC |
| Grips | not listed | Specialized Sip Grip |
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