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 L100 was design...

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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 L100 was designed to be a fully park, street and dirt worthy BMX bike. The Legion L100 features a professional-grade full 4130 chromoly frame (21” top tube), tapered headtube, mid BB shell, and removable brake mounts. The L100 4130 chromoly 8.75” rise handlebar and 50mm stem are designed for precision riding, while the wide aluminum double wall 36H rims and 2.4” BMX tires offer grip and durability when landing a trick. The 25x9T gearing with two-piece tubular chromoly 175mm hollow spindle cranks and mid sealed bottom bracket offer a clean, reliable drivetrains. An alloy U-brake with alloy brake levers provide speed control, while the 4130 chromoly BMX fork with 1-1/8" threadless steerer and taper leg helps maximize performance. This bike ships ready to be assembled and comes with a 5-year limited warranty on the frame and a 1-year limited warranty on parts.

  • The Legion L100 is a fully park, street or dirt worthy freestyle BMX bike that offers everything a rider could need from beginner level curb jumps all the way up to advanced aerial tricks on a quarterpipe. Suggested rider height is 5 ft 8 inches and Up
  • This ultra-durable L100 features a Mongoose full 4130 Chromoly frame, removable brake mounts, mid BB shell, and a 21-inch top tube length
  • The L100’s drivetrain features 175 millimeter 2-piece tubular chromoly hollow spindle cranks with a 25T alloy chainring and mid sealed bearing bottom bracket
  • The wheelset features 20 inches x 2.4 inches tires mounted on wide aluminum double wall 36H rims with 3/8 inches female axle front hub and 9T cog sealed bearing cassette rear hub
  • Alloy U-brake and brake levers provide precision speed control, while the 4130 chromoly handlebar and fork are joined by a 50 millimeter stem and threadless sealed integrated headset for maximum steering performance

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