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 that offers everything a rider could need from beginner level curb jumps all the way up to advanced aerial tricks on a quarterpipe!


  •    Mongoose full 4130 Chromoly frame, tapered headtube, removable brake mounts, and mid BB shell.
  •     175mm 2-piece tubular chromoly hollow spindle cranks with a 25T alloy chainring and mid sealed bearing bottom bracket.
  •     20” x 2.4” tires mounted on wide aluminum double wall 36H rims with 3/8” female axle front hub and 9T cog sealed bearing cassette rear hub.
  •     4130 chromoly handlebar and fork, 50mm stem, threadless sealed integrated headset, and Alloy U-brake.
  •     21-inch top tube length. Suggested rider height is 5'8" and up.


  • Frame: 4130 chromoly, BMX freestyle geometry, removable brake mounts, integrated headset, mid BB shell
  • Fork: 4130 chromoly
  • CrankS:2-piece, tubular chromoly hollow spindle, 25T aluminum chainring
  • Chain: KMC S1
  • Bottom Bracket: Mid sealed bearing, 8-spline spindle
  • Cog: Single-speed, 9T cassette driver
  • Rims: Xposure Infinity-XD, aluminum double wall, 30 mm ID, 36H
  • Front Hub: Aluminum, ball bearing, 3/8 in axle, 36H
  • Rear Hub: Aluminum, sealed-bearing cassette, 14 mm axle, 36H
  • Spokes: 14G, steel, black
  • Tyres: 20 in x 2.4 in, wire bead
  • Pedals: Mongoose, nylon
  • Brakes: U-brake, aluminum
  • Handlebars: Mongoose, 4130 chromoly, 29 in width, 8.75 in rise
  • Stem: Mongoose, threadless top load, 50 mm
  • Headset: Threadless, integrated 1-1/8”, cartridge bearing
  • Seat Post: Pivotal, steel, 250 mm, 25.4 mm
  • Saddle: Mongoose Pivotal
  • Grips: Mongoose MushXL, 160 mm 


Brand Mongoose

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