Fatboy

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.

Technical Specifications

FRAMESET

FRAME

Specialized M4 aluminum, fully-butted tubing w/smooth welds, tapered head tube, post-mount disc dropouts, 190mm rear hub spacing, replaceable alloy derailleur hanger

HEADSET

1-1/8"" upper, 1-1/2"" lower, threadless, Campy style, cartridge bearings

SEAT BINDER

Alloy, 31.8mm

SUSPENSION

FORK

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

WHEELS

RIMS

Stout XC, hookless alloy, single wall, 90mm inner width, sleeve joint, 32h

FRONT HUB

Specialized Stout XC 135, disc, sealed cartridge bearings, QR, 32h

REAR HUB

Specialized Stout XC 190, Hi Hi disc, alloy, sealed cartridge bearings, QR, 32h

SPOKES

Stainless, black, 14g

FRONT TIRE

Ground Control Fat, Control casing, 120 TPI, Aramid folding bead, 2Bliss Ready, 26x4.6""

REAR TIRE

Ground Control Fat, Control casing, 120 TPI, Aramid folding bead, 2Bliss Ready, 26x4.6""

INNER TUBES

Standard, Presta valve

DRIVETRAIN

REAR DERAILLEUR

SRAM X7 Type 2.1, long cage, 10-speed

SHIFT LEVERS

SRAM X7, 10-speed, trigger

CASSETTE

Sunrace, 10-speed, 11-40t

CHAIN

KMC X10L, 10-speed w/reusable MissingLink

CRANKSET

Specialized Stout XC Pro, forged alloy, 30mm alloy spindle, 100mm spindle width, 28T, 76mm BCD spider

BOTTOM BRACKET

PF30, sealed cartridge bearings

COCKPIT

HANDLEBARS

Specialized Stout, double-butted 6061 alloy, 9-degree backsweep, 5-degree upsweep, 15mm rise, 740mm width, 31.8mm

GRIPS

Specialized Sip Grip, half-waffle, S/M: regular thickness, L/XL: XL thickness

SADDLE

Body Geometry Henge Sport, steel rails, 143mm

SEATPOST

Specialized 2-bolt head, forged alloy, 8mm offset, micro-adjust, 30.9mm

STEM

Specialized Alloy, 3D forged, 4-bolt, 6-degree

BRAKES

FRONT BRAKE

Tektro Gemini, hydraulic disc, resin pads, i-Spec compatible, 180mm rotor

REAR BRAKE

Tektro Gemini, hydraulic disc, resin pads, i-Spec compatible, 160mm rotor

BRAKE LEVERS

Tektro Gemini, hydraulic, reach adjust, I-spec compatible

ACCESSORIES

PEDALS

Nylon platform w/reflectors

* 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

Manual Downloads

2016 Rider/Bike Weight Limits and Terrain Conditions

Specialized Bicycle Owner's Manual Addendum: Riding With Kids

Specialized Mission Control App (Android)

Specialized Bicycle Owner's Manual (All Languages)

Specialized Mission Control App (iOS)

Specialized Ride App (Android)

Specialized Ride App (iOS)

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