Mongoose Legion L100 BMX Bike – Green

$629.00 $699.00
Currently out of stock. Please call 03 9529 3752

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 Icon


4130 chromoly, BMX freestyle geometry, removable brake mounts, integrated headset, mid BB shell

Fork Icon


4130 chromoly

Crank Icon


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

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Bottom Bracket Icon


Mid sealed bearing, 8-spline spindle


Cog Icon


Single-speed, 9T cassette driver

Rim Icon


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

Hubs Icon


Aluminum, ball bearing, 3/8 in axle, 36H

Hubs Icon


Aluminum, sealed-bearing cassette, 14 mm axle, 36H

Spokes Icon


14G, steel, black

Tires Icon


20 in x 2.4 in, wire bead

Pedal Icon


Mongoose, nylon

Brakes Icon


U-brake, aluminum

Handlebar Icon


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

Stem Icon


Mongoose, threadless top load, 50 mm

Headset Icon


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

Seat Post Icon


Pivotal, steel, 250 mm, 25.4 mm

Saddle Icon


Mongoose Pivotal

Grips Icon


Mongoose Mush XL, 160 mm



One size


When you buy a new bike at

Test Ride Before Purchase

Pop into our store located in Prahran and our friendly staff will set up the bicycle in the correct size for
a test ride.

Custom fitting is also offered and included in the price. We will adjust handlebar height, grips and saddle for the perfect fit!

Making sure you are super comfortable on your new bike is our priority and there are plenty of options
available to make sure your new bike is a pleasure to ride.

Contact Us

Unlimited Free Service

All new bicycles purchased come with our exclusive 1 YEAR UNLIMITED FREE SERVICE. We recommend you return your bicycle for its first service 6-8 weeks of riding (approx. 200km). Our repair department is constantly busy servicing bicycles, so it's recommened that you call us a few days before you would like your bicycle serviced, and book in for our same day servicing.

Bicycle Size Guide

Here the Size guide. If you need help? Contact one of our expert!

Size Guide

Bike Freight Charges

This is a door to door service but depending on the delivery location, the total freight charge may additional charges per bicycle. You will be notified before we process your order if an additional freight charge applies to your order. This normally only applies to remote areas, outside of major cities.

Online Bicycles Orders

Please allow 3-5* working days for your bicycle to be delivered from time of payment being received. We take extra time and care in assembling your bicycle before it is packed and ready to send. Most online bicycle and department stores simply send the bicycle to you without any adjustments. We make sure the gears, brakes, wheels and all other components have been adjusted correctly first. All you need to do is fit the pedals, front wheel and stem. Easy to follow assembly instructions are included.

* Subject to stock location

Store Location

Monday to Friday: 9am - 5:30pm
Saturday: 9am - 5pm
Sunday: Closed