For 45 years, Mongoose has been in the dirt, down the trails, and on the ramps. With the Legion series, Mongoose offers a full line of freestyle BMX bikes for riders of all ages and ability levels. The Legion L40 was designe...

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Product Review

For 45 years, Mongoose has been in the dirt, down the trails, and on the ramps. With the Legion series, Mongoose offers a full line of freestyle BMX bikes for riders of all ages and ability levels. The Legion L40 was designed to be a fully park, street and dirt worthy BMX bike. The Legion L40 features a hi-ten steel frame (20. 5" top tube), tapered head tube, mid BB shell, and removable break mounts. The L40 hi-ten steel 8. 75" Rise handlebar and 50mm stem are designed for precision riding, while the aluminum single wall 36H rims and 2. 3" BMX tires offer grip and durability when landing a trick. The 25x9t gearing with 3-piece tubular chromo 175 mm hollow spindle cranks and mid sealed bottom bracket offer a clean, reliable drivetrains. Aluminum u-brake with alloy brake levers provide speed control, while the hi-ten steel BMX fork with 1-1/8" Thread less steered and taper leg helps maximize performance. This bike ships ready to be assembled and comes with a 5-year limited on the frame and a 1-year limited on parts.

  • L40 is a fully 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! Suggested rider height is 5’0”-5’6”
  • Durable bike, built with a Hi-Ten steel frame, removable brake mounts, and a mid BB shell, and has a top tube length of 20.5"
  • Equipped with a high-performance drivetrain that includes 175 mm 3-piece tubular chromoly hollow spindle cranks, a 25T steel chainring, and a mid-sealed bearing bottom bracket
  • Wheelset featuring 20" x 2.3" tires mounted on 36H aluminum single-wall rims, along with a 3/8" female axle front hub and a 9T cog sealed bearing cassette rear hub
  • Aluminum U-brake and brake levers provide precision speed control, while the Hi-Ten steel handlebar and fork are joined by a 50 mm stem and threadless sealed integrated headset for maximum steering performance

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