---
product_id: 151300973
title: "Legion Kids Freestyle BMX Bike"
brand: "mongoose"
price: "$1667.03"
currency: USD
in_stock: true
reviews_count: 13
category: "Mongoose"
url: https://www.desertcart.us/products/151300973-legion-kids-freestyle-bmx-bike
store_origin: US
region: United States of America
---

# 20-inch freestyle BMX wheels 2.4-inch wide double-wall aluminum rims 3-piece chromoly crankset Legion Kids Freestyle BMX Bike

**Brand:** mongoose
**Price:** $1667.03
**Availability:** ✅ In Stock

## Summary

> 🔥 Own the streets and parks with the Mongoose Legion L40 – where every trick counts! 🚲

## Quick Answers

- **What is this?** Legion Kids Freestyle BMX Bike by mongoose
- **How much does it cost?** $1667.03 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/151300973-legion-kids-freestyle-bmx-bike)

## 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

- • **Built to Endure:** Sealed rear hub, headset, 14mm axle, aluminum pedals, and nickel-plated chain withstand the toughest BMX sessions.
- • **Grip That Sticks:** Wide 2.4-inch tires on durable double-wall rims for ultimate control on street, dirt, and skateparks.
- • **Next-Level Performance:** Engineered for riders 5'3" to 6'0" pushing bigger tricks and longer sessions.
- • **Power Transfer Mastery:** Chromoly crank and sealed bearing bottom bracket deliver smooth, efficient pedaling every ride.
- • **Legacy of Limits Pushed:** From BMX pioneers Mongoose, 50+ years of action sports expertise fueling your ride.

## Overview

The Mongoose Legion L40 is a 20-inch freestyle BMX bike designed for youth riders between 5'3" and 6'0" tall. It features wide 2.4-inch tires on double-wall aluminum rims for superior grip, a durable 3-piece chromoly crank with sealed bearings for smooth power transfer, and robust components like a sealed rear hub and aluminum pedals built to withstand demanding BMX riding. Backed by Mongoose’s 50+ years of BMX heritage, this bike is optimized for street, dirt, and skatepark use, making it ideal for riders pushing their limits and mastering new tricks.

## Description

For 45 years, Mongoose has been in the dirt, down the trails, and on the ramps. With the Legion Series, Mongoose offers a full line of freestyle BMX bikes for riders of all ages and ability levels. The Legion L40 was designed to be a fully park, street and dirt worthy BMX bike. The Legion L40 features a Hi-Ten steel frame (20.5” top tube), tapered headtube, mid BB shell, and removable break mounts. The L40 Hi-Ten steel 8.75” rise handlebar and 50mm stem are designed for precision riding, while the aluminum single wall 36H rims and 2.3” BMX tires offer grip and durability when landing a trick. The 25x9T gearing with 3-piece tubular chromoly 175 mm hollow spindle cranks and mid sealed bottom bracket offer a clean, reliable drivetrains. Aluminum U-brake with alloy brake levers provide speed control, while the Hi-Ten steel BMX fork with 1-1/8" threadless steerer and taper leg helps maximize performance. This bike ships ready to be assembled and comes with a 5-year limited warranty on the frame and a 1-year limited warranty on parts.

Review: Sturdy and well made - Extremely well-made bike. Sturdy and heavy. Mongoose is always a reliable brand. Love the teal color. Highly recommended!
Review: Yes! Mongoose is back to the good stuff!!! - Just get one. This is Mongoose like in the 80's and early 90's. Not the junk crap that Walmart and other department stores still sell. Avoid those like the plague! But then, that's apparent to any real BMX rider. Those are all flash for what little you pay and no real quality. If you already have one of those, strip it down to the bare frame and only the frame and build everything else up from scratch. That's those bikes only hope. This on the other hand is fine the way it comes. Ok, may have to make a few tweaks and whatnot along the way, but that's to be expected of even the best BMX bikes. It's part of riding and making it your own. I do wish they'd have given it at least a somewhat taller seat post, and I'm also not crazy about how the seat is permanently attached to the seat post as well. Normal seat and seat post setup is, if the seat wears out or isn't to your liking, you can just stick a new seat on the seat post. Here, you have to replace both. Was expecting something like a pivoting seat post or perhaps the old bolt down kind. On the other hand, the seat that's here, by BMX standards, is plenty acceptable until I upgrade. I got the L60 and I'm not sure it mentions it in the details, but it appears as though it's sporting a rear wheel that's sealed while the front wheel is not sealed. But the L60 is totally the midrange offering of the whole Legion lineup. So it's expected that a few things are somewhat average, besides, the rear wheel is where you want and need a better quality one at, uh, if you're going to cut corners that is. Also, contrary to what I'm seeing in other reviews here, the brakes do work surprisingly well. More than adequate. The bike arrived perfectly and overall inspection found one very minor blemish. Top tube on left side has like a weird smudge in the paint job that then glossed over for it's final painting. I tried Goo Gone thinking it might have just been grease, it's kind of a blackish color against green giving that effect sorta, but after a good rubbing it remains unchanged, so I can tell it's permanently on there. Both very minor and totally cosmetic, a classic error no doubt the result of being mass produced. Everything else is brilliant here plus I caught a sweet sale on mine and got it for only $146.87 + tax. Arrived quickly, packaged well, everything is in perfect condition, so yeah, I'll excuse one little minor smudge. Thank you Mongoose!!!!

## Features

- L40 is a fully park, street or dirt-worthy freestyle BMX bike that offers everything a new rider could need to bust their first tricks on their local ramp! Suggested rider height is 5’0”-5’6”
- Durable bike, built with a Hi-Ten steel frame, removable brake mounts, and a mid BB shell, and has a top tube length of 20.5"
- Equipped with a high-performance drivetrain that includes 175 mm 3-piece tubular chromoly hollow spindle cranks, a 25T steel chainring, and a mid-sealed bearing bottom bracket
- Wheelset featuring 20" x 2.3" tires mounted on 36H aluminum single-wall rims, along with a 3/8" female axle front hub and a 9T cog sealed bearing cassette rear hub
- Aluminum U-brake and brake levers provide precision speed control, while the Hi-Ten steel handlebar and fork are joined by a 50 mm stem and threadless sealed integrated headset for maximum steering performance

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07W6L53Q7 |
| Additional Features | Aluminum Frame, BMX, freestyle |
| Age Range (Description) | Big Kid |
| Age Range Description | Big Kid |
| Best Sellers Rank | #57,967 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #7,913 in Cycling Equipment |
| Bicycle Drivetrain Type | single-speed |
| Bike Type | BMX Bike |
| Brake Style | U Brake |
| Brand | Mongoose |
| Brand Name | Mongoose |
| Color | White |
| Customer Reviews | 4.4 out of 5 stars 2,146 Reviews |
| Frame Material Type | High Tensile Steel |
| Gear Type | cassette |
| Global Trade Identification Number | 00038675187139 |
| Included Components | Mongoose Legion L40 Freestyle BMX Bike |
| Intended Riding Terrain | BMX Terrain |
| Item Type Name | BMX Freestyle Bike |
| Item Weight | 12 kg |
| Manufacturer | Pacific Cycle, Inc. |
| Minimum User Height | 60 inches |
| Model Name | Legion Intermediate |
| Model Number | M41500U10OS-PC |
| Model Year | 2020 |
| Number Of Speeds | 1 |
| Number of Handles | 1 |
| Number of Speeds | 1 |
| Seat Material | Plastic |
| Size | 20-Inch Wheels/L40 |
| Specific Uses For Product | Trail |
| Style Name | L40 |
| Suspension Type | Rigid |
| UPC | 038675187139 |
| Unit Count | 1 Count |
| Warranty Description | Limited lifetime warranty on frame and one year warranty on parts |
| Warranty Type | Limited |
| Wheel Material | Aluminum |
| Wheel Size | 20 inches |

## Product Details

- **Age Range (Description):** Big Kid
- **Bike Type:** BMX Bike
- **Brand:** Mongoose
- **Color:** White
- **Frame Material:** High Tensile Steel
- **Included Components:** Mongoose Legion L40 Freestyle BMX Bike
- **Number of Speeds:** 1
- **Special Feature:** Aluminum Frame, BMX, freestyle
- **Suspension Type:** Rigid
- **Wheel Size:** 20 inches

## Images

![Legion Kids Freestyle BMX Bike - Image 1](https://m.media-amazon.com/images/I/71+WKIWcY0L.jpg)

## Available Options

This product comes in different **Color, Size** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Sturdy and well made
*by O***N on September 11, 2026*

Extremely well-made bike. Sturdy and heavy. Mongoose is always a reliable brand. Love the teal color. Highly recommended!

### ⭐⭐⭐⭐⭐ Yes! Mongoose is back to the good stuff!!!
*by M***Y on May 2, 2023*

Just get one. This is Mongoose like in the 80's and early 90's. Not the junk crap that Walmart and other department stores still sell. Avoid those like the plague! But then, that's apparent to any real BMX rider. Those are all flash for what little you pay and no real quality. If you already have one of those, strip it down to the bare frame and only the frame and build everything else up from scratch. That's those bikes only hope. This on the other hand is fine the way it comes. Ok, may have to make a few tweaks and whatnot along the way, but that's to be expected of even the best BMX bikes. It's part of riding and making it your own. I do wish they'd have given it at least a somewhat taller seat post, and I'm also not crazy about how the seat is permanently attached to the seat post as well. Normal seat and seat post setup is, if the seat wears out or isn't to your liking, you can just stick a new seat on the seat post. Here, you have to replace both. Was expecting something like a pivoting seat post or perhaps the old bolt down kind. On the other hand, the seat that's here, by BMX standards, is plenty acceptable until I upgrade. I got the L60 and I'm not sure it mentions it in the details, but it appears as though it's sporting a rear wheel that's sealed while the front wheel is not sealed. But the L60 is totally the midrange offering of the whole Legion lineup. So it's expected that a few things are somewhat average, besides, the rear wheel is where you want and need a better quality one at, uh, if you're going to cut corners that is. Also, contrary to what I'm seeing in other reviews here, the brakes do work surprisingly well. More than adequate. The bike arrived perfectly and overall inspection found one very minor blemish. Top tube on left side has like a weird smudge in the paint job that then glossed over for it's final painting. I tried Goo Gone thinking it might have just been grease, it's kind of a blackish color against green giving that effect sorta, but after a good rubbing it remains unchanged, so I can tell it's permanently on there. Both very minor and totally cosmetic, a classic error no doubt the result of being mass produced. Everything else is brilliant here plus I caught a sweet sale on mine and got it for only $146.87 + tax. Arrived quickly, packaged well, everything is in perfect condition, so yeah, I'll excuse one little minor smudge. Thank you Mongoose!!!!

### ⭐⭐⭐⭐⭐ Good bike for the money
*by H***T on December 21, 2020*

All you need are some tools, a brain, some patience and reasonable expectations for this to be put together and on the road. If you have half a brain and basic tools, you’re going to be able to put this together without even looking at the instructions. This will come in a box, front tire packaged off. It comes with no tools, everything zip tied so it could remain intact on the long trip from CHIIIINA to the US. Packaging is solid. There are several thick zip ties to cut to break everything loose. You’re going to need: Metric hex tools A 15 and 18 mm socket for axels 15mm wrench or socket to tighten handlebar alignment Scissors or utility knife for zip ties Phillips screwdriver (for the reflectors only) You’ll need an extension bar to remove the nuts from the axels to install the pegs on front and back. Will take you about 60 seconds to do this. Front handlebars install with hex keys. Honestly not sure how anybody could have problems with this. It’s four bolts. Secure them, and you’re good. But man, some reviewers couldn’t figure this out. Install the seat with another hex socket. Put on the reflectors, hook up the brake, fill the tires with air, and you’re riding. Btw, the factory purposefully ships tires with less air than you’ll need for your benefit. Any tire sitting for an extended period will last longer if not fully inflated. Hooking up the brake is a bit of a pain in the A, as you won’t have enough slack in the front to properly attach the cable unless you briefly disconnect the rear brakes. Once you pull the cable through in the front to attach, reattach the rear. Took me a minute to figure this out. The front break setup is such that you can spin the handlebars around to 1) look cool, and 2) not have the brake line get wound around the front of the bike. The bike is good, solid and worth the money. Assembly, with any mechanical skill (even entry level mechanical skill) will take 20 minutes. Also, warning: you’re buying a $200 bike. It will last like a $200 bike. Many people on here complain about the quality. This isn’t a $1000 bike. Don’t pretend it is. Take care of it, don’t beat it to death and you’ll be good. If this was at all helpful, please hit the button.

## Frequently Bought Together

- Mongoose Legion Kids Freestyle BMX Bike, Intermediate Rider, Boys and Girls Bikes, 20-Inch Wheels, Hi-Ten Steel Frame, Micro Drive 25x9T BMX Gearing
- Zelerdo 2 Pairs Aluminum Alloy Bike Pegs for Mountain Bike Cycling Rear Stunt Pegs Fit 3/8 inch Axles
- Mongoose Legion Freestyle BMX Bike for Advanced-Level or Professional Riders, Adult Men Women, 4130 Chromoly Frame, and 20-Inch Wheels

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-10-04*