Legion L20 Zoom image

Legion L20

Ranging from the LXS to the L100, the Legion series of bikes offers everything a BMX rider could need from your first true BMX bike in the L18 to a fully park, street and dirt worthy machine in the L100. Mongoose® has infused over 40 years of experience along with feedback and insights from our pro riders to develop the best line of Legion bikes yet.
Sizes: OS
Frame: Hi-Ten steel BMX freestyle geometry, , , ,
Fork: Hi-Ten steel 20" 1 1/8" threadless steerer 3/8" x 100 mm
Crank: 1-piece 25T steel chainring
Bottom Bracket: American loose ball
Cog Set: ,9T cassette driver
Chain: KMC>Z410
Front Derailleur: ,
Wheel Size: 20"
Rims: aluminum single wall 19.4 mm, 36H,
Front Hub: steel ball bearing 3/8" axle 36H
Pedals: BMX nylon
Handlebar: Mongoose Hi-Ten 27.5" 8" 22.2 mm clamp
Stem: Mongoose,threadless top load, 50 mm,,
Headset: threadless sealed integrated 1-1/8" ball bearing
Brake Levers: aluminum
Spokes: 14G stainless steel, black
Saddle: Mongoose steel
Seat Post: steel, 250 mm, 25.4 mm
Extras: brake detangler, 2 pair axle pegs

BMX Size Guide

Use the top tube length found in the geometry chart below, to help you figure out which Mongoose BMX bike is best for you. Keep in mind, experience, riding style and preference must be taken into account as well.

BMX Sizing Guide Bike Geometry