---
product_id: 148013867
title: "Legion Kids Freestyle BMX Bike, Intermediate Rider, Boys and Girls Bikes, 20-Inch Wheels, Hi-Ten Steel Frame, Micro Drive 25x9T BMX Gearing"
brand: "mongoose"
price: "$1708.75"
currency: USD
in_stock: true
reviews_count: 8
category: "Mongoose"
url: https://www.desertcart.us/products/148013867-legion-kids-freestyle-bmx-bike-intermediate-rider-boys-and-girls
store_origin: US
region: United States of America
---

# 20-inch durable wheels Micro Drive 25x9T BMX gearing Hi-Ten steel frame for lasting strength Legion Kids Freestyle BMX Bike, Intermediate Rider, Boys and Girls Bikes, 20-Inch Wheels, Hi-Ten Steel Frame, Micro Drive 25x9T BMX Gearing

**Brand:** mongoose
**Price:** $1708.75
**Availability:** ✅ In Stock

## Summary

> 🚀 Own the streets with the Mongoose Legion – where every ride is a statement!

## Quick Answers

- **What is this?** Legion Kids Freestyle BMX Bike, Intermediate Rider, Boys and Girls Bikes, 20-Inch Wheels, Hi-Ten Steel Frame, Micro Drive 25x9T BMX Gearing by mongoose
- **How much does it cost?** $1708.75 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/148013867-legion-kids-freestyle-bmx-bike-intermediate-rider-boys-and-girls)

## 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

- • **Precision Control:** Aluminum U-brakes and levers deliver smooth, confident stopping power.
- • **Lightweight & Agile:** Aluminum rims and sealed bearing hubs ensure nimble rides and easy maneuvering.
- • **Optimized Performance:** Micro Drive 25x9T gearing with forged steel cranks for explosive acceleration.
- • **Street-Ready Durability:** Hi-Ten steel frame built to withstand every trick and tumble.
- • **Perfect Fit for Growing Riders:** Designed for kids 4’8” to 5’4” with a 20.25-inch top tube for ideal handling.

## Overview

The Mongoose Legion Kids Freestyle BMX Bike is a robust, intermediate-level bike designed for boys and girls aged roughly 4’8” to 5’4”. Featuring a durable Hi-Ten steel frame, 20-inch wheels with aluminum rims, and a high-performance Micro Drive 25x9T BMX drivetrain, it offers precision control and agility for freestyle riding. With a lightweight yet sturdy build, removable brake mounts, and a limited lifetime frame warranty, this bike is engineered to help young riders confidently master street tricks and trail rides.

## 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 L20 was designed to be a fully park, street and dirt worthy BMX bike. The Legion L20 features a Hi-Ten steel frame (20.25” top tube), tapered headtube, and removable brake mounts. The L20 Hi-Ten steel 8” rise handlebar and 48mm stem are designed for precision riding, while the wide aluminum single wall 36H rims and 2.3” BMX tires offer grip and durability. The 25x9T gearing with one-piece tubular chromoly 170mm hollow spindle cranks and American loose ball bottom bracket offer a clean, reliable drivetrains. An alloy 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: Great quality bike and light weight - This Legion L20 is the third Mongoose BMX bike I've purchased over the last year, and I've been very happy with all three (Legion LSX, Title Pro, and L20). Assembly was very easy on all three bikes; just need to attach the front wheel, handle bars, and pedals. Took only about 15 mins. You just need to pay attention to the direction of the forks and remember the left pedal will be left-hand threaded. The forks and pedals have stickers denoting front/rear, left/right. Besides adjusting for height and putting air in the tires, there really wasn't any need for fine adjustments (chain tension, brakes, misc. nuts, etc.), as these things are being adjusted correctly from the factory (nice surprise). After reading the negative reviews on this bike and the others mentioned, it seems many of them are related to incorrect user assembly. If you put the forks on backwards or don't put air in the tire, you're going to have problems. The Legion L20 is reasonably light at roughly 25 lbs., easy to ride, and looks great. Note, however, that this is a freestyle bike, and probably not the best choice if you're just looking for a neighborhood cruiser. The crank bracket sits about 1" higher than on a race type BMX bike, making the apex pedal feel too high when in a sitting position. This may not bother some people. If it does, you could buy shorter cranks, but with the money you'd spend, it would be more logical to just go with a race style bike with the lower bracket (and larger front sprocket). The Title series with a lengthened seat post makes for a great lightweight cruiser. Not much to complain about on this bike. Excellent quality for the money. If you're looking for a reasonably priced freestyle bike with good quality, at $156, this is a great choice.
Review: Good bike for the money - 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.

## Features

- L20 is a stylish freestyle BMX bike that offers everything a beginning rider needs to hit the streets and pop off curbs, Suggested rider height is 4’8”-5’4”
- Built to last with its Hi-Ten steel frame, removable brake mounts, and a top tube length of 20.25 inches
- Boasts a high-performance drivetrain equipped with 170mm one-piece forged steel cranks, a 25T alloy chainring, and an American loose ball bottom bracket
- Wheelset is equipped with 20” x 2.3” tires mounted on aluminum single wall 36H rims with 3/8” female axle front hub and 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 50mm stem and threadless sealed integrated headset for maximum steering performance

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Bike Type | BMX Bike |
| Age Range (Description) | Big Kid |
| Brand | Mongoose |
| Number of Speeds | 1 |
| Color | Blue |
| Wheel Size | 20 Inches |
| Frame Material | High Tensile Steel |
| Suspension Type | Rigid |
| Special Feature | Aluminum Frame, BMX, freestyle |
| Included Components | Mongoose Legion L20 Freestyle BMX Bike |
| Size | 20-Inch Wheels L20 |
| Brake Style | U Brake |
| Specific Uses For Product | Trail |
| Item Weight | 12 Kilograms |
| Style | L20 |
| Model Name | Legion Intermediate |
| Power Source | Pedal power (human energy transferred through a drivetrain) |
| Wheel Material | Aluminum |
| Year | 2020 |
| Seat Material Type | PU, Vinyl, or Plastic |
| Warranty Type | Limited |
| Maximum Weight Recommendation | 250 Pounds |
| Assembly Required | No |
| Global Trade Identification Number | 00038675187177 |
| Voltage | 25 Volts |
| Minimum User Height | 56 Inches |
| UPC | 038675187177 |
| Bicycle Drivetrain Type | Single-speed |
| Manufacturer | Pacific Cycle, Inc. |
| Item Package Dimensions L x W x H | 45.6 x 22.6 x 8.7 inches |
| Package Weight | 13.86 Kilograms |
| Item Dimensions  LxWxH | 23.62 x 8.66 x 48.82 inches |
| Brand Name | Mongoose |
| Warranty Description | Limited lifetime warranty on frame and one year warranty on parts |
| Material | Steel |
| Suggested Users | unisex-child |
| Number of Items | 1 |
| Part Number | M41800U10OS-PC |
| Grip Type | Mongoose Mush, 145 mm |

## Product Details

- **Bike Type:** BMX Bike
- **Age Range (Description):** Big Kid
- **Brand:** Mongoose
- **Number of Speeds:** 1
- **Color:** Blue
- **Wheel Size:** 20 Inches
- **Frame Material:** High Tensile Steel
- **Suspension Type:** Rigid
- **Special Feature:** Aluminum Frame, BMX, freestyle
- **Included Components:** Mongoose Legion L20 Freestyle BMX Bike

## Images

![Legion Kids Freestyle BMX Bike, Intermediate Rider, Boys and Girls Bikes, 20-Inch Wheels, Hi-Ten Steel Frame, Micro Drive 25x9T BMX Gearing - Image 1](https://m.media-amazon.com/images/I/71n8eMXVgML.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great quality bike and light weight
*by A***S on October 24, 2020*

This Legion L20 is the third Mongoose BMX bike I've purchased over the last year, and I've been very happy with all three (Legion LSX, Title Pro, and L20). Assembly was very easy on all three bikes; just need to attach the front wheel, handle bars, and pedals. Took only about 15 mins. You just need to pay attention to the direction of the forks and remember the left pedal will be left-hand threaded. The forks and pedals have stickers denoting front/rear, left/right. Besides adjusting for height and putting air in the tires, there really wasn't any need for fine adjustments (chain tension, brakes, misc. nuts, etc.), as these things are being adjusted correctly from the factory (nice surprise). After reading the negative reviews on this bike and the others mentioned, it seems many of them are related to incorrect user assembly. If you put the forks on backwards or don't put air in the tire, you're going to have problems. The Legion L20 is reasonably light at roughly 25 lbs., easy to ride, and looks great. Note, however, that this is a freestyle bike, and probably not the best choice if you're just looking for a neighborhood cruiser. The crank bracket sits about 1" higher than on a race type BMX bike, making the apex pedal feel too high when in a sitting position. This may not bother some people. If it does, you could buy shorter cranks, but with the money you'd spend, it would be more logical to just go with a race style bike with the lower bracket (and larger front sprocket). The Title series with a lengthened seat post makes for a great lightweight cruiser. Not much to complain about on this bike. Excellent quality for the money. If you're looking for a reasonably priced freestyle bike with good quality, at $156, this is a great choice.

### ⭐⭐⭐⭐⭐ 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.

### ⭐⭐⭐⭐⭐ Best bike around. My 10 Yr Old loves it.. I used to BMX and better than my bikes.
*by J***L on September 23, 2025*

This bike is Amazing. And even though I got it Used it came in Mint Condition still in the Box. Great Seller. My 10 Year old Daughter wanted a good Boys Bike and this one is outstanding. Much better than the Mongoose I had in 1984. I had to pull the handlebars back a little bit for her. Brakes are real good to compared to most that come on the bike. I think if you can get this for under $250. It's a steal.

## 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
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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-03-16*