Fatboy 20
Fatboy 20

Fatboy 20

Regular price $999.99 Sale price $639.95 Save $360.04


43 in stock

This is a special order item, available to ship within 5-10 business days.

This item is available for FREE Home Delivery in the Greater Bay Area and Sacramento Region or it can be picked up at any Mike's Bikes.

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.

  • 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.
  • The SRAM X4 9-speed rear derailleur provides plenty of gears for your little ones to make it up and down almost anything, while being tough enough for abuse.


Fully butted Specialized A1 Premium Aluminum, ZeroStack head tube, 100mm-wide threaded bottom bracket, 170mm rear hub spacing
FORK Specialized A1 Premium Aluminum, 1-1/8" alloy steerer
FRONT HUB Stout 135, loose ball bearings, 10x135 QR, 32h
REAR HUB Stout 170, loose ball bearings, 9-/10-speed cassette body, 10x170mm QR, 32h
SPOKES Stainless, 14g
RIMS 20" disc, alloy construction, 68mm internal width, 32h
INNER TUBES 20x4.0" tube, Presta valve
FRONT TIRE Ground Control Fat, 60 TPI, wire bead, 20x4.0"
REAR TIRE Ground Control Fat, 60 TPI, wire bead, 20x4.0"
CRANKSET 9-speed, 28T chainring w/ chainguard
BOTTOM BRACKET Square taper, 100x151.5mm, sealed bearings
SHIFT LEVERS SRAM, trigger, 9-speed
REAR DERAILLEUR SRAM X4, long cage, 6-/7-/8-speed
CASSETTE Sunrace, 9-Speed, 11-36t
CHAIN KMC X9, 9-speed w/ reusable MissingLink™
FRONT BRAKE Tektro Aries, mechanical disc, organic pads, 160mm rotor
REAR BRAKE Tektro Aries, mechanical disc, organic pads, 160mm rotor
HANDLEBARS Specialized, alloy, 9-degree backsweep, 4-degree upsweep, 680mm width, 31.8mm
GRIPS Specialized Body Geometry XCT, lock-on
STEM Alloy, 7-degree rise, 31.8mm clamp
SADDLE Specialized Youth, steel rails
SEATPOST Alloy, single-bolt, 27.2mm
SEAT BINDER Alloy, 31.8mm