With the Legion Series, Mongoose offers a full line of freestyle BMX bikes for riders of all ages and ability levels. The Legion L18 is the perfect in-between option for a kid who wants what comes on a standard 20” BMX but needs a slightly smaller frame!


  • Mongoose® Hi-Ten steel frame and fork; 7” handlebar
  • 1-piece forged steel crank; 140 mm crank arms; 25/9t gearing
  • Aluminum single wall 28H rims; 18 x 2.3” tires

Mongoose Legion L18 Silver 18" Wheel BMX Bike 2020

  • Wheel Size 18 in
    Frame Hi-Ten steel, BMX freestyle geometry
    Fork Hi-Ten steel
    Crank 1-piece, forged steel, 25T steel chainring
    Chain KMC S1
    Bottom Bracket American loose ball
    Drivetrain Single-speed, 9T cassette driver
    Rims Aluminum single wall, 24 mm ID, 28H
    Front Hub Steel, ball bearing, 3/8 in axle, 28H
    Rear Hub Steel, ball bearing, 3/8 in axle, 28H
    Spokes 14G, steel, black
    Tyres 18 in x 2.3 in, wire bead
    Pedals Mongoose, nylon
    Brakes U-brake, aluminum
    Handlebar Mongoose, Hi-Ten steel, 26 in width, 7 in rise
    Stem Mongoose, threadless front load, 48 mm
    Headset Threadless, 1-1/8" external, retainer bearing
    Seat Post Steel, 250 mm, 25.4 mm
    Saddle Mongoose, steel rails
    Grips Mongoose Zig, 130 mm