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Fatboy Pro

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2015 Fatboy Pro

All the fun of a fat bike with the performance of a Specialized. The Fatboy Pro combines a lightweight frame, RockShox Bluto fork, and 4.6" Ground Control tires to create a geometry similar to Specialized 29er geometry for nimble handling in the most extreme conditions.

Technical Specifications

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FRAMESET

FRAME

Specialized M4 Premium Aluminum, fully butted w/ smooth welds, tapered headtube, post-mount disc dropouts, 190mm rear hub spacing, replaceable alloy derailleur hanger

HEADSET

1-1/8"" upper, 1-1/2"" lower, integrated Campy style, sealed cartridge bearings, split crown race, 3.8mm cone spacer

SEAT BINDER

Command Post, single bolt, 34.9mm

SUSPENSION

FORK

RockShox Bluto RL, Solo Air spring, TurnKey damping, tapered alloy steerer, external rebound adj., 32mm alloy stanchions w/ mag lowers, disc mount, QR 15mm thru-axle for 150mm hub spacing

WHEELS

RIMS

Specialized Fatboy SL, alloy disc, single wall, 90mm wide, sleeve joint, hookless design, 32h

FRONT HUB

Specialized Hi Lo disc, sealed cartridge bearings, 15mm thru-axle, 150mm wide, 32h

REAR HUB

Specialized Hi Lo disc, alloy, sealed cartridge bearings, XD driver body, 190mm wide, QR, 32h

SPOKES

Stainless, 2.0/1.8/2.0mm

FRONT TIRE

Specialized Ground Control Fat, 120TPI, folding bead, 26x4.6""

REAR TIRE

Specialized Ground Control Fat, 120TPI, folding bead, 26x4.6""

INNER TUBES

Standard, presta valve

DRIVETRAIN

REAR DERAILLEUR

SRAM X01, 11-speed, carbon cage

SHIFT LEVERS

SRAM X01,11-speed, trigger

CASSETTE

SRAM X1, 11-speed, 11-42

CHAIN

KMC X11L, 11-speed, reusable Missing Link

CRANKSET

Race Face Next SL, PF30 BB, 100mm spindle, 30T, spiderless

COCKPIT

STEM

Specialized, 3D forged alloy, 4-bolt, 6-degree rise, anti-corrosion hardware

HANDLEBARS

Specialized, mini rise, 7050 alloy, 8-backsweep, 6-upsweep, 10mm rise, 31.8mm

GRIPS

Specialized Body Geometry XC Contour, Kraton w/ gel, lock-on, closed end

SADDLE

Body Geometry mountain, hollow Cr-Mo rails, 143mm

SEATPOST

Command Post BlackLite, alien head design, single bolt head, w/ remote adjust lever, 30.9mm, S: 100mm travel, M/L/XL: 125mm

BRAKES

FRONT BRAKE

Shimano XT, hydraulic disc, Ice Tech resin pads w/ fins, Ice Tech rotor

REAR BRAKE

Shimano XT, hydraulic disc, Ice Tech resin pads w/ fins, Ice Tech rotor

BRAKE LEVERS

Shimano XT, hydraulic, w/ reach adjust

ACCESSORIES

PEDALS

Specialized Bennies, 6061 alloy body, sealed cartridge, 4.5mm removable pins

* Weights based on production painted frames as pictured. Actual weights will vary based on colorway, frame size, and component variation. Specifications are subject to change without notice.

Geometry

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SMLXL
Top Tube Length (Horizontal)576mm603mm625mm650mm
Seat-Post Length350mm350mm400mm400mm
Seat Tube Angle (Effective)73°73°73°73°
Seat Tube Angle (Actual)73°73°73°73°
Handle-Bar Width750mm750mm750mm750mm
Seat Tube Length, Center to Top394mm445mm483mm533mm
Bottom Bracket Drop60mm60mm60mm60mm
Bottom Bracket Height315mm315mm315mm315mm
Wheel Base1083mm1105mm1128mm1154mm
Standover Height757mm793mm820mm849mm
Stack590mm600mm615mm629mm
Reach395mm420mm437mm458mm
Head Tube Length110mm120mm135mm150mm
Head Tube Angle70.5°70.5°70.5°70.5°
Chainstay Length455mm455mm455mm455mm
Crank Length170mm175mm175mm175mm
Stem Length60mm60mm70mm70mm
Geometry

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