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. The frame features an M4 alloy construction that provides the ideal blend of efficiency and durability, while the geometry creates a roomy top tube and short chainstays for easy climbing and confident descending. A FACT carbon fiber fork provides tons of compliance and absorbs chatter, while simultaneously keeping the overall weight of the bike down. Our Stout XC 90 alloy rims have been laced to Stout XC hubs to form a wheelset that's dependable, rugged, and efficient. So whether you're trail riding or plowing through the snow, these wheels will be the perfect mix of performance and strength. 26x.4.6" Ground Control tires help soak up bumps, while also providing a game-changing level of traction, control, and floatation for better handling out in the wild. Our Stout XC Pro one-by crankset features a forged alloy construction that provides plenty of security from chain drop, while also leading the way for an efficient, lightweight, and simplified drivetrain with plenty of gear range for hard drives on the flats and climbs.
FRAMESpecialized M4 aluminum, fully-butted tubing w/ smooth welds, tapered head tube, post-mount disc dropouts, 190mm rear hub spacing, replaceable alloy derailleur hanger FORKSpecialized FACT carbon, full monocoque, tapered steerer, 135mm hub spacing, open QR dropouts HEADSET1-1/8" upper, 1-1/2" lower, threadless, Campy style, cartridge bearings STEMSpecialized Stout XC, 3D forged alloy, 4-bolt, 6-degree rise, anti-corrosion hardware HANDLEBARSSpecialized Stout, double-butted 6061 alloy, 9-degree backsweep, 5-degree upsweep, 15mm rise, 31.8mm GRIPSSpecialized Sip Grip, light lock-on, half-waffle, S/M: regular thickness, L/XL: XL thickness FRONT BRAKETektro Gemini, hydraulic disc, resin pads, I-spec compatible REAR BRAKETektro Gemini, hydraulic disc, resin pads, I-spec compatible BRAKE LEVERSTektro Gemini, hydraulic, reach adjust, I-spec compatible REAR DERAILLEURSRAM X7 Type 2.1, 10-speed, long cage SHIFT LEVERSSRAM X7, 10-speed, trigger CASSETTE Custom Sunrace, wide range, 10-speed, 11-40t CHAINKMC X10L, 10-speed, w/ reusable MissingLink CRANKSETSpecialized Stout XC Pro, forged alloy, 30mm alloy spindle, 100mm spindle width, 28T, 76mm BCD spider BOTTOM BRACKET Samox, PF30, sealed cartridge PEDALSNylon, 1 pc. body, 9/16", w/ reflectors RIMSSpecialized Stout XC 90, disc, alloy, single wall, 90mm wide, sleeve joint, hookless design, 32h FRONT HUBSpecialized Stout XC 135, Hi Hi disc, alloy, sealed cartridge bearings, QR, 32h REAR HUBSpecialized Stout XC 190, Hi Hi disc, alloy, sealed cartridge bearings, QR, 32h SPOKESStainless, 14g, black FRONT TIRESpecialized Ground Control Fat, 120TPI, folding bead, 26x4.6" REAR TIRESpecialized Ground Control Fat, 120TPI, folding bead, 26x4.6" INNER TUBESStandard, Presta valve SADDLEBody Geometry Henge Sport, steel rails, 143mm SEATPOSTAlloy, 2-bolt, 12.5mm offset, 30.9mm, anti-corrosion hardware SEAT BINDERAlloy, 31.8mm