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.

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.

Part No:
    • FRAME

      M5 Aluminum, fully butted w/smooth welding, tapered head tube and seat tube, 100mm of travel, forged post mount 160mm disc drop outs, internal routing, forged bottom bracket shell, 197x12mm thru-axle rear

    • FORK

      Carbon, 46mm offset, tapered steerer, 150mm axle spacing

    • FRONT HUB

      Specialized Stout XC, alloy disc, double-sealed cartridge bearings, 15x150mm thru-axle, 32h

    • REAR HUB

      Stout XC, disc alloy, SRAM XD driver body, sealed cartridge bearings, 12x148mm thru-axle, 32h

    • SPOKES

      Stainless, 14g, black

    • RIMS

      Specialized 26" disc front, 21mm depth, 86mm internal width, 32h

    • INNER TUBES

      Standard, Presta valve

    • FRONT TIRE

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

    • REAR TIRE

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

    • CRANKSET

      RaceFace Aeffect Cinch, 28T chainring, 11-speed, threaded BB

    • SHIFT LEVERS

      SRAM X7, 10-speed, trigger

    • REAR DERAILLEUR

      SRAM X7 Type 2.1, long cage, 10-speed

    • CASSETTE

      Sunrace, 10-speed, 11-42t

    • CHAIN

      10-speed, extra lightweight hollow outer links w/reusable Missing Link # CL559R

    • 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

    • HANDLEBARS

      Double-butted alloy, 9-degree backsweep, 5-degree upsweep, 15mm rise, 750mm width, 31.8mm

    • GRIPS

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

    • STEM

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

    • SADDLE

      Body Geometry Henge Comp, hollow Cr-Mo rails, 143mm

    • SEATPOST

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

    • SEAT BINDER

      Alloy, 31.8mm

    • PEDALS

      Specialized Dirt Pedals

    Specifications subject to change without notice.

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 M5 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
  • Tough, ultra-wide alloy rims are dependable and rugged. So whether you're trail riding or plowing through the snow, these wheels will be the perfect mix of performance and strength
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Fatboy

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Geometry

  S M L XL
Stack 590mm 600mm 614mm 628mm
Reach 395mm 420mm 437mm 458mm
Head-Tube Length 110mm 120mm 135mm 150mm
Head-Tube Angle 70.5° 70.5° 70.5° 70.5°
B-B Height 316mm 316mm 316mm 316mm
B-B Drop 60mm 60mm 60mm 60mm
Trail 84mm 84mm 84mm 84mm
Fork Length (full) 467mm 467mm 467mm 467mm
Fork Rake/Offset 46mm 46mm 46mm 46mm
Front-Center 634mm 663mm 685mm 711mm
Chain-Stay Length 455mm 455mm 455mm 455mm
Wheelbase 1083mm 1111mm 1133mm 1159mm
Top-Tube Length (horizontal) 576mm 603mm 625mm 650mm
Bike Stand-Over Height 754mm 786mm 812mm 840mm
Seat-Tube Length 394mm 445mm 483mm 533mm
Seat-Tube Angle 73° 73° 73° 73°
Crank Length 170mm 175mm 175mm 175mm
Handlebar Width 750mm 750mm 750mm 750mm
Stem Length 60mm 60mm 70mm 70mm
Saddle Width 143mm 143mm 143mm 143mm
Seat Post Length 350mm 350mm 400mm 400mm

  • Stack 590mm
    Reach 395mm
    Head-Tube Length 110mm
    Head-Tube Angle 70.5°
    B-B Height 316mm
    B-B Drop 60mm
    Trail 84mm
    Fork Length (full) 467mm
    Fork Rake/Offset 46mm
    Front-Center 634mm
    Chain-Stay Length 455mm
    Wheelbase 1083mm
    Top-Tube Length (horizontal) 576mm
    Bike Stand-Over Height 754mm
    Seat-Tube Length 394mm
    Seat-Tube Angle 73°
    Crank Length 170mm
    Handlebar Width 750mm
    Stem Length 60mm
    Saddle Width 143mm
    Seat Post Length 350mm
    View S Geometry
  • Stack 600mm
    Reach 420mm
    Head-Tube Length 120mm
    Head-Tube Angle 70.5°
    B-B Height 316mm
    B-B Drop 60mm
    Trail 84mm
    Fork Length (full) 467mm
    Fork Rake/Offset 46mm
    Front-Center 663mm
    Chain-Stay Length 455mm
    Wheelbase 1111mm
    Top-Tube Length (horizontal) 603mm
    Bike Stand-Over Height 786mm
    Seat-Tube Length 445mm
    Seat-Tube Angle 73°
    Crank Length 175mm
    Handlebar Width 750mm
    Stem Length 60mm
    Saddle Width 143mm
    Seat Post Length 350mm
    View M Geometry
  • Stack 614mm
    Reach 437mm
    Head-Tube Length 135mm
    Head-Tube Angle 70.5°
    B-B Height 316mm
    B-B Drop 60mm
    Trail 84mm
    Fork Length (full) 467mm
    Fork Rake/Offset 46mm
    Front-Center 685mm
    Chain-Stay Length 455mm
    Wheelbase 1133mm
    Top-Tube Length (horizontal) 625mm
    Bike Stand-Over Height 812mm
    Seat-Tube Length 483mm
    Seat-Tube Angle 73°
    Crank Length 175mm
    Handlebar Width 750mm
    Stem Length 70mm
    Saddle Width 143mm
    Seat Post Length 400mm
    View L Geometry
  • Stack 628mm
    Reach 458mm
    Head-Tube Length 150mm
    Head-Tube Angle 70.5°
    B-B Height 316mm
    B-B Drop 60mm
    Trail 84mm
    Fork Length (full) 467mm
    Fork Rake/Offset 46mm
    Front-Center 711mm
    Chain-Stay Length 455mm
    Wheelbase 1159mm
    Top-Tube Length (horizontal) 650mm
    Bike Stand-Over Height 840mm
    Seat-Tube Length 533mm
    Seat-Tube Angle 73°
    Crank Length 175mm
    Handlebar Width 750mm
    Stem Length 70mm
    Saddle Width 143mm
    Seat Post Length 400mm
    View XL Geometry