Fatboy
Part No.  

Fatboy

Part No.  106560
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Fatboy
Overview
Technical Specifications
Geometry
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.
  • 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.
  • 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 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.
  • 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.

Technical Specifications

DRIVETRAIN
CHAIN KMC X10L, 10-speed w/reusable MissingLink
BOTTOM BRACKET PF30, sealed cartridge bearings
CRANKSET Specialized Stout XC Pro, forged alloy, 30mm alloy spindle, 100mm spindle width, 28T, 76mm BCD spider
SHIFT LEVERS SRAM X7, 10-speed, trigger
CASSETTE Sunrace, 10-speed, 11-40t
REAR DERAILLEUR SRAM X7 Type 2.1, long cage, 10-speed
SUSPENSION
FORK Specialized FACT carbon, full monocoque, tapered steerer, 135mm hub spacing, open QR dropouts
WHEELS
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
INNER TUBES Standard, Presta valve
SPOKES Stainless, black, 14g
RIMS Stout XC, hookless alloy, single wall, 90mm inner width, sleeve joint, 32h
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""
COCKPIT
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
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
BRAKES
FRONT BRAKE Tektro Gemini, hydraulic disc, resin pads, i-Spec compatible, 180mm rotor
BRAKE LEVERS Tektro Gemini, hydraulic, reach adjust, I-spec compatible
REAR BRAKE Tektro Gemini, hydraulic disc, resin pads, i-Spec compatible, 160mm rotor
ACCESSORIES
PEDALS Nylon platform w/reflectors
FRAMESET
HEADSET 1-1/8"" upper, 1-1/2"" lower, threadless, Campy style, cartridge bearings
SEAT BINDER Alloy, 31.8mm
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

Geometry

Geometry Chart

Fatboy - Geometry

S M L XL
  S M L XL
Stem Length 60mm 60mm 70mm 70mm
Crank Length 170mm 175mm 175mm 175mm
Seatpost Length 350mm 350mm 400mm 400mm
Handlebar Width 750mm 750mm 750mm 750mm
Reach 395mm 420mm 437mm 458mm
Stack 590mm 600mm 614mm 628mm
Wheelbase 1083mm 1111mm 1133mm 1159mm
Bike Stand-Over Height 754mm 786mm 812mm 840mm
Head-Tube Length 110mm 120mm 135mm 150mm
Front-Center 634mm 663mm 685mm 711mm
Fork Rake/Offset 46mm 46mm 46mm 46mm
Head-Tube Angle 70.5° 70.5° 70.5° 70.5°
Trail 84mm 84mm 84mm 84mm
B-B Height 316mm 316mm 316mm 316mm
Chain-Stay Length 455mm 455mm 455mm 455mm
Fork Length (full) 467mm 467mm 467mm 467mm
Seat-Tube Angle 73° 73° 73° 73°
B-B Drop 60mm 60mm 60mm 60mm
Seat-Tube Length 394mm 445mm 483mm 533mm
Top-Tube Length (horizontal) 576mm 603mm 625mm 650mm