Fatboy 20

So Junior wants to get rad just like Mom and Dad? Well, our Fatboy 20 has your kid's name all over it. It has all the same benefits as our "big kid" Fatboy, only it's built on 20-inch wheels for an ultra-low standover height and kids' size. The family that eats trails together stays together.

So Junior wants to get rad just like Mom and Dad? Well, our Fatboy 20 has your kid's name all over it. It has all the same benefits as our "big kid" Fatboy, only it's built on 20-inch wheels for an ultra-low standover height and kids' size. The family that eats trails together stays together.

Select

Part No:
    • FRAME

      Specialized A1 Premium Aluminum, fully-butted w/ smooth welds, ZeroStack head tube, 170mm rear hub spacing, replaceable alloy derailleur hanger

    • FORK

      Specialized A1 Premium Aluminum, 1-1/8" alloy steerer

    • HEADSET

      1-1/8", threadless, ZeroStack, semi-cartridge bearings

    • STEM

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

    • HANDLEBARS

      Specialized Stout XC, flat bar, double-butted 6061 alloy, 9-degree backsweep, 4-degree upsweep, 31.8mm

    • GRIPS

      Specialized Body Geometry XCT, Kraton w/ gel, lock-on, closed end, 121.5mm

    • FRONT BRAKE

      Tektro Aries, mechanical disc, organic pads

    • REAR BRAKE

      Tektro Aries, mechanical disc, organic pads

    • BRAKE LEVERS

      Tektro, Jr V-brake

    • REAR DERAILLEUR

      SRAM X4, long cage

    • SHIFT LEVERS

      SRAM X4, 9-speed, trigger

    • CASSETTE

      Sunrace, 9-speed, 11-36t

    • CHAIN

      KMC X9, 9-speed, w/ reusable MissingLink

    • CRANKSET

      Forged alloy, 32T, w/ chainguard

    • BOTTOM BRACKET

      Square taper, sealed cartridge bearings, 100mm shell, 164mm axle

    • PEDALS

      Nylon, loose ball bearings, 9/16", w/ reflectors

    • RIMS

      Specialized Stout XC 90, disc, alloy, single wall, 90mm wide, sleeve joint, 32h

    • FRONT HUB

      Specialized 135, Hi Hi disc, alloy, loose ball bearings, QR, 32h

    • REAR HUB

      Specialized 170, Hi Hi disc, alloy, double-sealed loose ball bearings, QR, 32h

    • SPOKES

      Stainless, 14g

    • FRONT TIRE

      Specialized Ground Control Fat, 60TPI, wire bead, 20x4.0"

    • REAR TIRE

      Specialized Ground Control Fat, 60TPI, wire bead, 20x4.0"

    • SADDLE

      Specialized youth, steel rails

    • SEATPOST

      Alloy, single bolt, 27.2mm

    • SEAT BINDER

      Forged alloy, single bolt, 31.8mm

  • The frame features an A1 Premium Aluminum 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.
  • Our A1 Premium Aluminum fork is lightweight and pairs up perfectly with the fat wheel system to soak up trail chatter and bumps.
  • Our Fatboy alloy rims serve as the foundation of a wheelset that's dependable, rugged, and efficient. So whether Junior is doing some trail riding or plowing through the snow, these wheels will be the perfect mix of performance and strength.
  • 20x.4.0" Ground Control tires help soak up bumps, while also providing crazy levels of traction, control, and floatation for better handling out on the trail.
  • A forged alloy crankset will take a licking, while a chainguard has also been added to make sure that Junior's laces or pants keep clear of the drivetrain.

Geometry

  20.0
Stack 464mm
Reach 319mm
Head-Tube Length 120mm
Head-Tube Angle 69°
B-B Height 264mm
B-B Drop 25mm
Trail 75mm
Fork Length (full) 360mm
Fork Rake/Offset 35mm
Front-Center 526mm
Chain-Stay Length 390mm
Wheelbase 914mm
Top-Tube Length (horizontal) 470mm
Bike Stand-Over Height 583mm
Seat-Tube Length 280mm
Seat-Tube Angle 72°
Handlebar Width 640mm
Stem Length 60mm
Crank Length 127mm
Seatpost Length 300mm
  • Stack 464mm
    Reach 319mm
    Head-Tube Length 120mm
    Head-Tube Angle 69°
    B-B Height 264mm
    B-B Drop 25mm
    Trail 75mm
    Fork Length (full) 360mm
    Fork Rake/Offset 35mm
    Front-Center 526mm
    Chain-Stay Length 390mm
    Wheelbase 914mm
    Top-Tube Length (horizontal) 470mm
    Bike Stand-Over Height 583mm
    Seat-Tube Length 280mm
    Seat-Tube Angle 72°
    Handlebar Width 640mm
    Stem Length 60mm
    Crank Length 127mm
    Seatpost Length 300mm
    View 20.0 Geometry