2021 Mongoose Legion L40 20' BMX Bike Black


With the Legion Series, Mongoose offers a full line of freestyle BMX bikes for riders of all ages and ability levels. The Legion L40 is a full park, street or dirt worthy freestyle BMX bike that offers everything a new rider could need to bust their first tricks on their local ramp!

Key Features:
  • Hi-Ten steel frame, removable brake mounts, and mid-BB shell.
  • 175mm 3-piece tubular Chromoly hollow spindle cranks with a 25T steel chainring and mid sealed bearing bottom bracket.
  • 20” x 2.3” tires mounted on aluminium single wall 36H rims with 3/8” female axle front hub and 9T cog sealed bearing cassette rear hub.
  • Hi-Ten steel handlebar and fork, 50mm stem, threadless sealed integrated headset, and Aluminum U-brake.
  • 20.5-inch top tube length. Suggested rider height is 5’0” – 5’6”

    Sale prices do not apply to Cycle to Work scheme purchases. Please ensure that you use the full RRP when obtaining your C2W scheme voucher.

    For finance purchases on bikes that are in the SALE, please add 10% to the discounted sale price. 

    Representative example RRP £1500 Sale Price £1275. Finance SALE price is £1402 - 10% deposit of £140.25 followed by 12 interest free payments of £105.19. Total price payable £1402. 

    Model Name Legion L40
    Model Number M41501U
    Wheel Size 20 in
    Frame Hi-Ten steel, BMX freestyle geometry, mid BB shell
    Fork Hi-Ten steel
    Crank 3-piece, tubular chromoly, 25T steel chainring
    Chain KMC S1
    Bottom Bracket Mid sealed bearing, 8-spline spindle
    Drivetrain Single-speed, 9T cassette driver
    Rims Aluminum single wall, 24 mm ID, 36H
    Front Hub Steel, ball bearing, 3/8 in axle, 36H
    Rear Hub Steel, sealed-bearing cassette, 14 mm axle, 36H
    Spokes 14G, steel, black
    Tyres 20 in x 2.3 in, wire bead
    Pedals Mongoose, nylon
    Brakes U-brake, aluminum
    Handlebar Mongoose, Hi-Ten steel, 28 in width, 8 in rise
    Stem Mongoose, threadless top load, 50 mm
    Headset Threadless, integrated 1-1/8", retainer bearing
    Seat Post Steel, 250 mm, 25.4 mm
    Saddle Mongoose Unifier, 1 piece rails
    Grips Mongoose MushXL, 160 mm

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