---
product_id: 229693661
title: "Mongoose Unisex Legion L100 BMX Bike Green 20 Inch"
brand: "mongoose"
price: "A$329"
currency: AUD
in_stock: true
url: https://www.desertcart.com.au/products/229693661-mongoose-unisex-legion-l100-bmx-bike-green-20-inch
store_origin: AU
region: Australia
---

# 4130 Chromoly steel frame - ultra durable & lightweight 20x2.4 wide tires on double-wall 36H aluminum rims - superior grip & stability 175mm tubular chromoly cranks + 25T aluminum chainring - precision drivetrain Mongoose Unisex Legion L100 BMX Bike Green 20 Inch

**Brand:** mongoose
**Price:** A$329
**Availability:** ✅ In Stock

## Summary

> 🚀 Own the streets with the Mongoose Legion L100 – where durability meets daring style!

## Quick Answers

- **What is this?** Mongoose Unisex Legion L100 BMX Bike Green 20 Inch by mongoose
- **How much does it cost?** A$329 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.au](https://www.desertcart.com.au/products/229693661-mongoose-unisex-legion-l100-bmx-bike-green-20-inch)

## Best For

- mongoose enthusiasts

## Why This Product

- Trusted mongoose brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Wide, Rugged Tires:** Conquer urban terrain with 20x2.4 tires mounted on durable double-wall aluminum rims for unmatched control.
- • **Precision Drivetrain:** Experience smooth power transfer with tubular chromoly cranks and a sealed bearing bottom bracket.
- • **Pro-Grade Chromoly Frame:** Ride with confidence on a full 4130 chromoly steel frame built for strength and agility.
- • **Designed for the Ambitious Rider:** Optimized for riders 5'8" and up, this 20-inch BMX blends style and function for the modern trailblazer.
- • **Integrated Performance Components:** Threadless sealed headset, 50mm stem, and aluminum U-brakes deliver responsive handling and stopping power.

## Overview

The Mongoose Unisex Legion L100 BMX Bike features a robust 4130 chromoly steel frame and fork, paired with a precision drivetrain including 175mm tubular chromoly cranks and a 25T aluminum chainring. Its 20x2.4 tires on double-wall 36H aluminum rims ensure superior grip and stability, while integrated components like a threadless sealed headset and aluminum U-brakes provide responsive control. Designed for riders 5'8" and taller, this lightweight 12kg BMX bike is engineered for performance and urban adventure.

## Description

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

## Features

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

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Age range | Adult |
| Bike type | BMX Bike |
| Brake type | U Brake |
| Color | Green |
| Size | 20 Inch |
| Style | Modern |
| Frame material | Chromoly Steel |
| Handle type | BMX Bar |
| Material type | Aluminium |
| Number of speeds | 2 |
| Power source | Pedal power |
| Features | Lightweight |
| Suspension | Rigid |
| Wheel size | 29 Inches |
| Included components | Aluminium Front Hub, Rear Chainring, 2-Piece Tubular Chromoly Hollow Spindle BB, Sealed Mid Pedals, Nylon Seat, Mongoose Pivotal Gearing, Brake, 25T Sprocket, Xposure Infinity-XD Aluminum Double Wall Rims (Front and Rear), 30 mm ID, 36H, 20" X 2.4" Wire Bead Tyres 3/8" Axle (Front), 14 (Rear), 36H Threadless Integrated 1-1/8", Cartridge Bearing Headset, Top Load Stem, 50 mm, 4130 Forks, Frame, Bars, Removable Brake Hardware |
| Brand | Mongoose |
| Department | Unisex |
| Manufacturer | Mongoose |
| Item model number | M41201U10OS |
| Product Dimensions | 62 x 23 x 135 cm; 12 kg |
| ASIN | B088NLPF1K |

## Product Details

- **Bike type:** BMX Bike
- **Age range (description):** Adult
- **Brand:** Mongoose
- **Number of speeds:** 2
- **Colour:** Green
- **Wheel size:** 29 Inches
- **Frame material:** Chromoly Steel
- **Suspension type:** Rigid
- **Special feature:** Lightweight
- **Included components:** Aluminium Front Hub, Rear Chainring, 2-Piece Tubular Chromoly Hollow Spindle BB, Sealed Mid Pedals, Nylon Seat, Mongoose Pivotal Gearing, Brake, 25T Sprocket, Xposure Infinity-XD Aluminum Double Wall Rims (Front and Rear), 30 mm ID, 36H, 20" X 2.4" Wire Bead Tyres 3/8" Axle (Front), 14 (Rear), 36H Threadless Integrated 1-1/8", Cartridge Bearing Headset, Top Load Stem, 50 mm, 4130 Forks, Frame, Bars, Removable Brake Hardware

## Images

![Mongoose Unisex Legion L100 BMX Bike Green 20 Inch - Image 1](https://m.media-amazon.com/images/I/81USp3u-2tL.jpg)
![Mongoose Unisex Legion L100 BMX Bike Green 20 Inch - Image 2](https://m.media-amazon.com/images/I/71j36OnJQPL.jpg)
![Mongoose Unisex Legion L100 BMX Bike Green 20 Inch - Image 3](https://m.media-amazon.com/images/I/71DWKyYa0oL.jpg)
![Mongoose Unisex Legion L100 BMX Bike Green 20 Inch - Image 4](https://m.media-amazon.com/images/I/71kUWQuBpuL.jpg)
![Mongoose Unisex Legion L100 BMX Bike Green 20 Inch - Image 5](https://m.media-amazon.com/images/I/71KAWH5GNjL.jpg)

## Questions & Answers

**Q: how much does the l500 weigh? bike only not the packaging.**
A: I weighed my L500 on 2 scales.  26 pounds in a spring scale and 25.78 on a digital scale.  Stock with the plastic chain guard removed.

**Q: When will this bike be available again for $500? Whats going on?**
A: its a old style bike , not sure if its in current production.  Seems they are selling old new stock . I paid 199 for my sons month ago.

**Q: How much does the L500 weigh?**
A: I weighed my L500 on 2 scales. 26 pounds on a spring scale and 25.78 on a digital scale. Stock with the plastic chain guard removed.

**Q: Hi I need the bike to be packed for travel, is it packaged so I can check it into cargo on a flight? Anyone know the dimensions of the package?**
A: The box dimensions for the Legion are:  48.425x9.055x23.622.  Thanks, Jen

## Frequently Bought Together

- Mongoose Legion Freestyle BMX Bike for Advanced-Level or Professional Riders, Adult Men Women, 4130 Chromoly Frame, and 20-Inch Wheels
- Zelerdo 2 Pairs Aluminum Alloy Bike Pegs for Mountain Bike Cycling Rear Stunt Pegs Fit 3/8 inch Axles
- Mongoose Legion Kids Freestyle Sidewalk BMX Bike, Beginner Riders, Boys and Girls, 16-20-inch Wheels, Hi-Ten Steel Frame, Micro Drive BMX Gearing

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**Shop now:** [https://www.desertcart.com.au/products/229693661-mongoose-unisex-legion-l100-bmx-bike-green-20-inch](https://www.desertcart.com.au/products/229693661-mongoose-unisex-legion-l100-bmx-bike-green-20-inch)

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*Product available on Desertcart Australia*
*Store origin: AU*
*Last updated: 2026-01-25*