Mongoose Legion Freestyle BMX Bike
- 4130 Chromoly front triangle, fork and bars
- 20" x 2.3" tires on 36H aluminum rims
- Rider height 5'6" - 6'0"
- 20.75 inches top tube
- 175 mm 3-piece chromoly cranks, 25T chainring, 9T cassette hub
- Aluminum U-brake, removable brake mounts
- 26.5 pounds
- Limited lifetime frame warranty, one year on parts
Updated 3 days ago · Based on the Amazon listing and published specifications, not hands-on testing.
A strong chromoly freestyle BMX with sealed bearings, a cassette hub and removable brake mounts, built for park, street and dirt. Its geometry targets taller, skilled riders, not kids learning tricks.
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ASIN: B07WBW3Q69
Overview
An advanced rider who spends weekends at the skatepark or dirt jumps gets a chromoly frame and fork with sealed bearings throughout. Three piece cranks drive a small cassette hub, and an aluminum U-brake can come off for a brakeless setup.
Pro level parts are the reason to buy, with chromoly where it matters and sealed bearings that keep grit out. Single wall rims are a weak point for heavy landings, and the fit suits riders of average adult height or taller.
Who it's for
Teens and adults with BMX experience riding park, street and dirt get strong parts and a long top tube. Young kids and casual cruisers will find it too big and too specialized.
Pros and cons
- Chromoly frame front triangle and fork
- Sealed bearing hubs and bottom bracket
- Three piece chromoly cranks
- Removable brake mounts
- Single wall rims
- Handlebar material listed two ways
- Sized for taller riders
- Assembly details not listed
Performance notes
Chromoly tubing flexes and recovers under hard landings, which is why it outlasts plain steel on jumps. A small rear cog with a mid sized chainring gives quick acceleration for park lines, while sealed bearings hold speed by keeping dirt out.
Specifications
| Brand | Mongoose |
|---|---|
| Dimensions & fit | |
| Minimum User Height | 66 inches |
| Capacity & performance | |
| Age Range Description | Youth |
| Bicycle Drivetrain Type | Single-speed |
| Number Of Speeds | 1 |
| Power & efficiency | |
| Power Source | manual |
| Construction & materials | |
| Color | Red |
| Frame Material Type | Chromoly Steel |
| Seat Material | Leather |
| Wheel Material | Aluminum |
| Warranty & support | |
| Warranty Type | Limited |
| Other details | |
| Additional Features | Lightweight |
| Bike Type | BMX Bike |
| Brake Style | U Brake |
| Derailleur Configuration | Rear |
| Gear Type | cassette |
| Number Of Handles | 2 |
| Skill Level | Advanced |
| Specific Uses For Product | Trail |
| Style Name | L80 |
| Suspension Type | Rigid |
Frequently asked questions
Can you run the Mongoose Legion L80 brakeless?
The frame has removable brake mounts, so the aluminum U-brake can be removed for a brakeless setup.
Is the Mongoose Legion L80 good for kids?
Mongoose suggests a rider height of 5'6" - 6'0" and an advanced skill level, so it does not suit small children.
What hubs does the Mongoose Legion L80 use?
A 3/8" female axle front hub and a 9T cog sealed bearing cassette rear hub.