Mongoose – Legion L500


With the Legion Series, Mongoose offers a full line of freestyle BMX bikes for riders of all ages and ability levels. As our flagship model, the L500 is designed to take on the raddest ramps and quarterpipes, and handle the abuse that advanced riders can throw at it!

  • 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 and sealed Freecoaster 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.
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FRAME4130 chromoly, BMX freestyle geometry, removable brake mounts, integrated headset

FORK4130 chromoly

CRANK2-piece, tubular chromoly hollow spindle, 25T aluminum chainring


BOTTOM BRACKETMid sealed bearing, Mid sealed bearing, 48-spline spindle

REAR COGSingle-speed, 9T freecoaster

RIMSXposure Infinity-XD, aluminum double wall, 30 mm ID, 36H

FRONT HUBAluminum, sealed-bearing, 3/8 in bolt, 36H

REAR HUBAluminum, sealed bearing freecoaster rear hub, 14 mm axle, 36H

SPOKES14G, steel, black

TIRES20 in x 2.4 in, wire bead

PEDALSMongoose, nylon

BRAKESU-brake, aluminum

HANDLEBARMongoose, 4130 chromoly, 29 in width, 8.75 in rise

STEMMongoose, threadless top load, 50 mm

HEADSETThreadless, integrated 1-1/8”, cartridge bearing

SEAT POSTPivotal, steel, 250 mm, 25.4 mm

SADDLEMongoose Pivotal

GRIPSMongoose, 160 mm

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