Mongoose Racer X BMX Style Bike 20" 2021


Mongoose Racer X BMX Style Bike 20" 2021

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KidFit™ technology has been embedded into the design of every juvenile Mongoose Bike and the Racer X BMX style bike is no exception.  Built with Hi-Ten steel handlebar, but lightened with an alloy frame, this looks like a cool BMX but is way lighter and easier to ride. The coaster brakes give strong stopping power and control.




  • 32/16T drivetrain; 1-piece forged steel 127 mm crank
  • 20” wheels with 2.125” sidewalk tires
  • Mongoose® Hi-Ten 176 mm rise handlebar



Frame IconFRAMETectonic T1, aluminum, 20” kids geometry, 100 mm dropout

Fork IconFORKMongoose, 20”, steel steerer, 100 mm, bolt-on

Crank IconCRANKMongoose 1-piece narrow Q-factor, 32T

Chain IconCHAINKMC Z410

Bottom Bracket IconBOTTOM BRACKETInternal, 1-piece, American, 68 mm shell


Cog IconREAR COGSingle-speed, 16T

Rim IconRIMSAluminum single wall, 28H

Hubs IconFRONT HUBSteel, 3/8 in axle, 28H

Hubs IconREAR HUBSteel, 3/8 in axle, 28H, coaster brake

Spokes IconSPOKES14G, stainless steel

Tires IconTIRESMongoose, 20 in x 2.125 in, wire bead

Pedal IconPEDALSKids, plastic

Brakes IconBRAKESAluminum caliper front, rear steel coaster brake


Handlebar IconHANDLEBARMongoose, Hi-Ten steel, 580 mm width, 176 mm rise, 22.2 mm clamp

Stem IconSTEMAluminum/steel, quill, 50 mm ext., 22.2 mm clamp

Headset IconHEADSETThreaded, EC22.2/27, retainer bearing

Seat Post IconSEAT POSTSteel, 250 mm, integrated saddle, 27.2 mm

Saddle IconSADDLEMongoose Kids, integrated rails

Grips IconGRIPSMongoose, kids

SizesSIZESOne Size

Extras IconEXTRASRear fender, number plate, handlebar and stem pad

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