Mongoose Legion L40 BMX Bike

Regular price $327.49 $272.91 Out of Stock
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  • Take on the knock, bumps jumps thrills and spills with the Legion L40 BMX Bike from Mongoose, designed for the BMX enthusiast and those who are working their way to the top! This tough machine has been built upon a high-tensile steel frame that offers plenty of confidence around the streets and parks, while the 20” wheelset offers plenty of support. Equipped with a rear alloy u-brake allows you shred off the excess speed and controlled via the alloy brake lever. The Mongoose Leigon L60 has been offered a three piece tubular Cromo 175mm crankset combined with 25x9T drivetrain that offers the perfect strength to weight ratio! With stiff and strong gearing you can power the skate park and streets yet, with lighter components doesn’t leave the bike feeling bogged down. The 8-spline spindle improves pedalling performance and the integrated seat/seat post system provides style, and fundamentally keeps weight down!

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Product Specs
  1. FRAME MATERIAL: Hi-Ten steel; mid BB shell
  2. WHEEL SIZE: 20"
  3. TOP TUBE LENGTH: 20.5"
  5. HEADTUBE ANGLE: 74.5°
  7. FORKS: Hi-Ten steel; 1-1/8” threadless steerer; taper leg
  8. BARS: Mongoose Hi-Ten, 8.75"
  9. STEM: Mongoose, Top Load 50mm Ext.
  10. HEADSET: 1-1/8" Threadless External
  11. BRAKE MOUNTS: Welded
  12. BRAKES: Aluminum U-brake
  13. FRONT HUB: Steel, 3/8” axle; 36H
  14. FRONT RIM: Alloy single-wall 36H
  15. REAR HUB: 36H, 9T Cassette, 14 mm axle, sealed bearing, AL shell
  16. REAR RIM: Alloy single-wall 36H
  17. TYRES: 20x2.30" Multi-Surface
  18. SPROCKET: 25T Steel Sprocket
  19. CRANKS: 3-Piece Chromoly
  20. BB: Mid sealed bearing 8-spline spindle
  21. PEDALS: Mongoose Resin Platform
  22. SEAT: Mongoose 1-Piece Seat/Post Combo
  23. GEARING: 25/9

Product Highlights
  • Great for riders who are between 5ft and 6ft tall (150cm - 180cm)
  • Designed to excel at Street riding thanks to responsive geometry but will feel at home in any riding environment
  • Strong Hi-Ten steel frame
  • U-brake system on welded mounts
  • 3 pc Chromoly cranks


we have compiled a complete bmx buyers guide to help you through the process!
Here at sourcebmx we are all riders so we can offer advice that only 100% rider-owned bmx shops can - just ask


BMX bikes are measured in two ways, the size of the wheel (20” is the standard BMX Wheel size) and the length of the frame which is gauged by the top tube measurement which we have also simplified for you into XS, Small, Medium etc categories.

Below is a guide to what size you should be looking for. note there is some overlap in sizes as personal preference also comes into the equation.