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    Fatboy

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    2020 Fatboy

    The security and control that the Fatboy provides is unparalleled. Those fat, 27.5x3.8 tires dramatically boost your traction, grip, and floatation over the trail. We built the Fatboy with a durable list of components, like a SRAM 12-speed one-by drivetrain, that perform season after season.

    A VERY FAT FLAVOR OF ADVENTURE

    It boils down to a single word: adventure. The Fatboy's massive tires (27.5x3.8") float over rocks, roots, sand, snow, ice.... Let's put it this way, if it's part of mother earth, those big tires will roll right over it with a mix of comfort and traction that's unrivaled. Get out there.

    • Premium, M5 alloy frame is light on the scales, yet holds up to any adventure.

    • Lightweight carbon-fiber fork provides tons of compliance and absorbs chatter.

    • The SRAM SX Eagle 1X drivetrain is simple, yet gives you plenty of gearing to tackle any climb.

    Technical Specifications

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    Frameset

    FRAME

    Specialized M5 Aluminum, fully butted w/ Smooth Welds, tapered head tube and seat tube, forged post-mount 160mm disc dropouts, internal routing, forged bottom bracket shell, 197x12mm rear thru-axle

    SEAT BINDER

    Alloy, bolt-type, 34.9mm

    Suspension

    FORK

    Specialized FACT carbon, 46mm offset, tapered steerer, 150mm axle

    Cockpit

    STEM

    Specialized, 3D-forged alloy, 4-bolt, 7-degree rise

    HANDLEBARS

    Stout Riser, double-butted alloy, 9-degree backsweep, 5-degree upsweep, 15mm rise, 750mm / 780mm width, 31.8mm

    GRIPS

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

    SADDLE

    Specialized Bridge, size specific, 143/155

    SEATPOST

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

    Brakes

    FRONT BRAKE

    SRAM Level T, hydraulic disc, 200/180mm

    REAR BRAKE

    SRAM Level T, hydraulic disc, 180/160mm

    Drivetrain

    REAR DERAILLEUR

    SRAM SX Eagle, 12-speed

    SHIFT LEVERS

    SRAM SX Eagle, trigger, 12-speed

    CHAIN

    SRAM SX Eagle, 12-speed w/ PowerLock®

    CRANKSET

    SRAM X01 Eagle, DUB, 30T

    CHAINRINGS

    Steel, 30T

    Wheels

    RIMS

    Stout XC 80, 27.5", alloy, 76mm internal width, disc-specific, tubeless ready

    FRONT HUB

    Stout Pro 150, sealed cartridge bearings, 6-bolt disc, 15x150mm, 32h

    REAR HUB

    Stout Pro 197, sealed cartridge bearings, 6-bolt disc, 12x197mm, 32h

    FRONT TIRE

    Maxxis Minion FBF, 120 TPI, EXO, 27.5 x 3.8"

    REAR TIRE

    Maxxis Minion FBR, 120 TPI, EXO, 27.5 x 3.8"

    INNER TUBES

    Presta valve

    Wheels & Tires

    SPOKES

    Stainless, 14g

    Accessories

    PEDALS

    * 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

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    SMLXL
    Crank Length170mm175mm175mm175mm
    Handlebar Width750mm750mm750mm750mm
    Stem Length60mm60mm70mm70mm
    Saddle Width155mm143mm143mm143mm
    Seatpost Length350mm350mm400mm400mm
    Stack602mm602mm617mm632mm
    Reach395mm420mm437mm458mm
    Head Tube Length94mm94mm110mm125mm
    Head Tube Angle71°71°71°71°
    BB Height312mm312mm312mm312mm
    BB Drop60mm60mm60mm60mm
    Trail83mm83mm83mm83mm
    Fork Length, Full496mm496mm496mm496mm
    Fork Rake/Offset47mm47mm47mm47mm
    Front Center640mm665mm687mm713mm
    Chainstay Length455mm455mm455mm455mm
    Wheelbase1088mm1113mm1135mm1161mm
    Top Tube Length, Horizontal579mm604mm626mm651mm
    Bike Standover Height, Actual765mm786mm813mm847mm
    Seat Tube Length394mm434mm470mm520mm
    Seat Tube Angle73mm73mm73mm73mm
    Geometry

    Rider Reviews

    • 4
    • 6 Reviews

    Rocky Mountain Snow Cruiser!

    Bought this in January 2020, added a dropper and Maxxis Colossus 4.5 tires. By far the easiest tubeless conversion I've ever done, just remove the tube! The Stout rims utilize a neoprene nipple washer so rim tape is not needed!!! The SX derailleur is the bikes Achilles heel. The spring is weak and sometimes it's impossible to shift to the smallest cog, especially at low temperatures.


    Name:
    Tony A.

    Helpful?

    3 flats in first 400 miles

    I bought this and had to fix the back tire 2 times and the front tire once. 95% of my mileage has been on the road. This amount of flats are unacceptable. I like the bike otherwise.


    Name:
    Ryan D.

    Helpful?

    Big fun in the snow

    Bought it for winter riding, never got off it. Big wheels keep on turnin'. .Hope to add a dropper seatpost soon.


    Name:
    Sven B.

    Helpful?

    Brakes are junk!

    The first time that I ride this bike is down a steep and rocky canyon. I am surprised at how the brakes fail to stop me. I only weigh 170 pounds also. Don't expect much from the entry level SX drivetrain either. I am told that the rims are not tubeless ready, so I have pay for another yet upgrade.


    Name:
    Tomt

    Helpful?

    Front rotor noise was almost a deal breaker.

    This bike is as advertised. I like the ride, like the versatility it provides. However, when I bought the bike, the front rotor was vibrating and made a very loud and high pitched noise that increased with an increase in speed. On day 2, I took the bike back to WheelSport in Spokane and they tried several times (they had the bike for a week) to adjust this with no luck. They took the entire front assembley apart several times and re-installed, trying to fix the problem. The guys at WS agreed that this noise was not acceptable and finally just replaced the front rotor (at their cost) with a new $150 rotor. Had they not been able to do this, I would have returned the bike. I have no idea if this is a common issue or just a fluke but it was obvious and annoying from the start. Hopefully it was only an issue on my bike. I have always ridden Specialized but that is in large part because of the guys at Wheelsport, not necessarily just the bikes.


    Name:
    Compasssteve

    Helpful?