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8 Singletracks members own this.
MSRP: $2,000
#1 out of 107 Fat Bikes
Brand: Specialized
All the fun of a fat bike with the performance of a Specialized. The Fatboy combines a lightweight frame and fork with 4.6" Specialized Ground Control tires for nimble handling in the most extreme conditions.

New, fully butted M4 Premium Aluminum frame with 190mm rear spacing and a tapered headtube for a lightweight platform with stiffness where you need it and clearance for 5" tires

New, full monocoque, Specialized FACT carbon fiber fork with 5-inch tire clearance is super-lightweight and stiff

Wide, 4.6" Specialized Ground Control tires with foldable aramid bead are light, fast rolling, and provide excellent traction regardless of the terrain

Custom 2x10 PF30 crankset with 100mm spindle provides tough and dependable performance

Tektro Draco 2 hydraulic disc brakes provide powerful and consistent braking, regardless of the weather, temperature or terrain

SRAM X7 10-speed rear derailleur provides fast and reliable shifting that can handle all the elements


FRAMENew Specialized M4 Premium Aluminum, 29er geometry, fully butted w/ smooth welds, tapered headtube, post-mount disc dropouts, replaceable alloy derailleur hanger



FORKFACT carbon full monocoque, 5.0" tire clearance, 135mm spacing

HEADSET1-1/8" upper and 1-1/2" lower FSA, Campy style w/ integrated cartridge bearings, 3.8mm cone spacer

STEMSpecialized 3D forged 6061 alloy, 4-bolt clamp, 6-degree rise, 60mm/70mm length, 31.8mm

HANDLEBARSSpecialized mini riser bar, 6061 double-butted alloy, 660/700mm wide, 10-degree backsweep, 6-degree upsweep, 31.8mm

GRIPSSRAM, 92mm grip, included with SRAM S-Series GS shifter

FRONT BRAKETektro Draco 2, hydraulic disc, dual piston, 180mm rotor

REAR BRAKETektro Draco 2, hydraulic disc, dual piston, 160mm rotor

BRAKE LEVERSTektro Draco 2, hydraulic lever

FRONT DERAILLEURSRAM X7, low direct mount

REAR DERAILLEURSRAM X7, 10-speed, medium carbon cage

SHIFT LEVERSSRAM S-Series, Grip Shift twist shifter, 10-speed

CASSETTE Sunrace, 10-speed, 11-36


CRANKSETCustom 2x10, 2 piece, PF30, forged alloy crankarm, w/ 100mm CNC spindle, 170mm/175mm length


BOTTOM BRACKET Samox, PF30 for 2 pc. crankset, 100mm shell, included w/ crankset

PEDALSAlloy, 1 pc. body and cage, w/ reflectors, 9/16"

RIMSSpecialized Fatboy SL, alloy disc, single wall, 90mm wide, sleeve joint, hookless design, 32 hole

FRONT HUBSpecialized MTB disc, alloy, Hi Lo flange, sealed bearings, 135mm wide, alloy axle, QR, 32h

REAR HUBSpecialized MTB disc, alloy, Hi Lo flange, sealed bearings, 190mm wide, alloy axle, QR, 32h

SPOKESStainless, 2.0, threadlock, 14g

FRONT TIRESpecialized Ground Control, 26x4.6", Kevlar bead, 120TPI

REAR TIRESpecialized Ground Control, 26x4.6", Kevlar bead, 120TPI

INNER TUBESStandard presta valve

SADDLEBody Geometry Henge, steel rails, 143mm

SEATPOSTSpecialized alloy, 2-bolt, micro-adjust, 30.9mm, 350mm/400mm

SEAT BINDERForged alloy, QR, 34.9mm

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