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    MSRP
    Where to Buy
    $1

    At

    Category
    Fat
    4.7
    Frame
    Aluminum
    Carbon
    Wheels
    Aluminum
    Wheel Size
    26″
    Tektro Gemini Hydraulic Disc
    X7
    Drivetrain
    1 × 10
    Brand Site

    specialized.com

    Summary
    The Specialized Fatboy is a 26″ aluminum frame rigid fat bike with upper mid-range components.

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    Insights
    Gear Range

    A bike with lower gearing will be easier to ride up steep hills, while a higher top end means it will pedal faster down hills.

    Lowest gear

    (climbing)

    20 mph

    Fatboy

    Highest gear

    (descending)

    Geometry
    Specs
    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

    BB StandardPF30, Press Fit

    Fork

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

    Bottom Bracket

    PF30, sealed cartridge bearings

    Headset

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

    Stem

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

    Handlebar

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

    Saddle

    Body Geometry Henge Sport, steel rails, 143mm

    Seatpost

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

    TypeRigid

    Pedals

    Nylon platform w/reflectors

    Grips

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

    Groupset
    Rear Derailleur

    SRAM X7 Type 2.1, long cage, 10-speed

    Crank

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

    Shifters

    SRAM X7, 10-speed, trigger

    Cassette

    Sunrace, 10-speed, 11-40t

    Chain

    KMC X10L, 10-speed w/reusable MissingLink

    Brakes

    Front: Tektro Gemini, hydraulic disc, resin pads, i-Spec compatible, 180mm rotor, Rear: Tektro Gemini, hydraulic disc, resin pads, i-Spec compatible, 160mm rotor

    TypeTektro Gemini Hydraulic Disc

    Brake Levers

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

    Wheels
    Rims

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

    Spokes

    Stainless, black, 14g

    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

    Tires

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

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