Starting at $1,920.00
Part No.  


Starting at $1,920.00
Part No.  
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Technical Specifications

Going fat isn't just a fun way to ride—it's a ride revolution. The security and control that the wheel system, found on our Fatboy, provides is unparalleled. You get dramatically more traction, grip, and floatation than with traditional mountain tires, all without sacrificing much to climbing efficiency.

The end result is easy to explain—you have way more fun. And to make sure of it, we built the Fatboy with a durable list of components that are low-maintenance and eager to perform season after season. Have more fun—go fat.

  • The frame features an M5 alloy construction that provides the ideal blend of efficiency and durability, while the geometry creates a roomy top tube and short chainstays for easy climbing and confident descending. 
  • A FACT carbon fiber fork provides tons of compliance and absorbs chatter, while simultaneously keeping the overall weight of the bike down.
  • The SRAM NX one-by groupset keeps things simple, and is ready to take on the trail for the long haul.

Technical Specifications

CHAIN KMC X11, 11-speed, anti-corrosion coating, w/ MissingLink™
CRANKSET Raceface Aeffect crank, BSA
SHIFT LEVERS SRAM NX, trigger, 11-speed
CASSETTE SRAM NX, 11-speed, 11-42t
REAR DERAILLEUR SRAM NX, long cage, 11-speed
FORK Specialized FACT carbon, 46mm offset, tapered steerer, 150mm axle
FRONT HUB Stout Pro 150, sealed cartridge bearings, 6-bolt disc, 15x1150mm, 32h
REAR HUB Sealed cartridge bearings, 6-bolt disc, 19x197mm axle, 10-speed alloy freehub, 32h
INNER TUBES Standard, Presta valve
SPOKES Stainless, 14g
RIMS Stout XC 80, 26", 76mm internal width, 32h, tubeless ready
FRONT TIRE Ground Control Fat, Control casing, 120 TPI, Aramid folding bead, 26x4.6"
REAR TIRE Ground Control Fat, Control casing, 120 TPI, Aramid folding bead, 26x4.6"
SADDLE Body Geometry Henge Comp, hollow Cr-Mo rails, 143mm
SEATPOST Specialized 2-bolt head, forged alloy, 8mm offset, micro-adjust, 30.9mm
STEM Specialized Alloy, 3D forged, 4-bolt, 6-degree
HANDLEBARS Stout Pro Riser, double-butted alloy, 9-degree backsweep, 5-degree upsweep, 15mm rise, 750mm width, 31.8mm
GRIPS Specialized Sip Grip, half-waffle, S/M: regular thickness, L/XL: XL thickness
FRONT BRAKE SRAM Level T hydraulic disc, organic pads, 200/180mm rotors
REAR BRAKE SRAM Level T hydraulic disc, organic pads, 180/160mm rotors
PEDALS Specialized Dirt
SEAT BINDER Alloy, 31.8mm
FRAME Specialized M5 Aluminum, fully butted w/Smooth Welds, tapered head tube and seat tube, forged post mount 160mm disc dropouts, internal routing, forged bottom bracket shell, 197x12mm thru-axle rear


Geometry Chart

Fatboy - Geometry

  S M L XL
Crank Length 170MM 175MM 175MM 175MM
Stem Length 60MM 60MM 70MM 70MM
Seatpost Length 350MM 350MM 400MM 400MM
Saddle Width 143mm 143mm 143mm 143mm
Handlebar Width 750MM 750MM 750MM 750MM
Reach 395mm 420mm 437mm 458mm
Top Tube Length, Horizontal 576mm 603mm 625mm 650mm
Stack 590mm 600mm 614mm 628mm
Wheelbase 1083mm 1111mm 1133mm 1159mm
Chainstay Length 455mm 455mm 455mm 455mm
Front Center 634mm 663mm 685mm 711mm
BB Drop 60mm 60mm 60mm 60mm
BB Height 316mm 316mm 316mm 316mm
Seat Tube Angle 73° 73° 73° 73°
Head Tube Angle 70.5° 70.5° 70.5° 70.5°
Seat Tube Length 394mm 445mm 483mm 533mm
Head Tube Length 110mm 120mm 135mm 150mm
Bike Standover Height 754mm 786mm 812mm 840mm
Fork Rake/Offset 46mm 46mm 46mm 46mm
Fork Length, Full 467mm 467mm 467mm 467mm
Trail 84mm 84mm 84mm 84mm