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2015 Fatboy Expert

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All the fun of a fat bike with the performance of a Specialized. The Fatboy Expert…

Product Details

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.

Fat 26" disc, alloy single wall rims are designed to handle even the worst terrain
Specialized Ground Control Fat 26x4.6" tires roll over anything
Specialized FACT carbon fork w/ 5-inch tire clearance for stiff handling
Shimano Deore, hydraulic disc brakes w/ dual piston stopping power in all conditions
SRAM X0 Type 2, 10-speed, medium cage derailleur for crisp and reliable shifting
Custom e.thirteen, PF30, crankset w/ 100mm spindle delivers power and shifting precision
Fully butted M4 Premium Aluminum frame w/ up to 5-inch tire clearance is lightweight and stiff

Technical Specifications

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

	S	M	L	XL
Top Tube Length (Horizontal)	576mm	603mm	625mm	650mm
Seat-Post Length	350mm	350mm	400mm	400mm
Seat Tube Angle (Effective)	73°	73°	73°	73°
Seat Tube Angle (Actual)	73°	73°	73°	73°
Handle-Bar Width	750mm	750mm	750mm	750mm
Seat Tube Length, Center to Top	394mm	445mm	483mm	533mm
Bottom Bracket Drop	60mm	60mm	60mm	60mm
Bottom Bracket Height	315mm	315mm	315mm	315mm
Wheel Base	1083mm	1105mm	1128mm	1154mm
Standover Height	757mm	793mm	820mm	849mm
Stack	590mm	600mm	615mm	629mm
Reach	395mm	420mm	437mm	458mm
Head Tube Length	110mm	120mm	135mm	150mm
Head Tube Angle	70.5°	70.5°	70.5°	70.5°
Chainstay Length	455mm	455mm	455mm	455mm
Crank Length	170mm	175mm	175mm	175mm
Stem Length	60mm	60mm	70mm	70mm