2015 Specialized Fatboy Pro vs 2015 Trek Farley
The M is the Trek Farley size closest to your M Specialized Fatboy Pro. 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 Pro in M, the Trek Farley in M places the top of the head tube 5 mm lower and 9 mm further back, relative to the bottom bracket. Its wheelbase is 15 mm shorter, which can contribute to quicker direction changes.
- Frame stack
- −5 mm
- Lower front end
- Frame reach
- −9 mm
- Shorter frame reach
- Wheelbase
- −15 mm
- Shorter: quicker to change direction
- Head angle
- −0.5°
- Slacker: calmer steering
- Chainstays
- −15 mm
- Shorter: livelier
The two frames
Only the Specialized Fatboy Pro is drawn. The Trek Farley numbers we have for size M are missing the seat angle.
Geometry side by side
| Measurement | Specialized Fatboy Pro M | Trek Farley M | Difference |
|---|---|---|---|
| Reach | 420mm | 411 | −9 mm |
| Stack | 600mm | 595 | −5 mm |
| Head tube angle | 70.5° | 70.0° | −0.5° |
| Seat tube angle | 73° | not listed | |
| Effective top tube | 603mm | 593 | −10 mm |
| Chainstay length | 455mm | 440 | −15 mm |
| Wheelbase | 1105mm | 1090 | −15 mm |
| BB drop | 60mm | 55 | −5 mm |
| BB height | 315mm | 313 | −2 mm |
| Standover | 793mm | 782 | −11 mm |
| Seat tube length | 445mm | 419 | −26 mm |
| Head tube length | 120mm | 100 | −20 mm |
Differences are the Trek Farley minus the Specialized Fatboy Pro. Full charts: 2015 Specialized Fatboy Pro, 2015 Trek Farley.
Where each sits in its class
Specialized Fatboy ProTrek 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 Pro | Trek Farley6 |
|---|---|---|
| Frame | not listed | Trek Alpha Platinum |
| Shifter | not listed | Shimano Deore |
| Derailleur | not listed | SRAM X-5, Shimano Deore XT |
| Cassette | not listed | Shimano HG50 |
| Chain | not listed | KMC X10 |
| Tire | not listed | Bontrager Hodag |
| Rim | not listed | Sun Ringlé Mulefüt |
| Brake | not listed | Avid DB 1 |
| Headset | not listed | FSA IS2 |
| Saddle | not listed | Bontrager Evoke 2 |
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