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Fatboy Expert

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2015 Fatboy Expert

All the fun of a fat bike with the performance of a Specialized. The Fatboy Expert combines a lightweight frame and fork with 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, Campy style, integrated sealed cartridge bearings, split crown race, 3.8mm cone spacer

SEAT BINDER

Alloy, 34.9mm

SUSPENSION

FORK

Specialized FACT carbon, full monocoque, tapered steerer, 135mm hub spacing

WHEELS

RIMS

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

FRONT HUB

Specialized MTB Hi Lo disc, alloy, sealed cartridge bearings, 135mm 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

FRONT DERAILLEUR

SRAM X7, 2x10, low direct mount

REAR DERAILLEUR

SRAM X0 Type 2, 10-speed, medium cage

SHIFT LEVERS

SRAM S-Series, Grip Shift, 10-speed

CASSETTE

Sunrace, 10-speed, 11-36

CHAIN

KMC X10L, 10-speed, reusable Missing Link

CRANKSET

Custom e.thirteen, TRS+, PF30, 100mm spindle, w/ BB, 104/64mm BCD spider

CHAINRINGS

Praxis, 36/22, alloy

COCKPIT

STEM

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

HANDLEBARS

Specialized, low rise, double butted 6061 alloy, 9-degree backsweep, 5-degree upsweep, 15mm rise, 31.8mm

GRIPS

SRAM, S-Series Grip Shift, 92mm

SADDLE

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

SEATPOST

Alloy, 2-bolt, 12.5mm offset, 30.9mm, anti-corrosion hardware

BRAKES

FRONT BRAKE

Shimano Deore BR-M506, hydraulic disc, dual piston, resin pads

REAR BRAKE

Shimano Deore BR-M506, hydraulic disc, dual piston, resin pads

BRAKE LEVERS

Shimano Deore BL-M506, 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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