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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Availability:
Only 2 left in stock, order soon!
Arrives
Friday, Jun 27
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Style: L80
Size: 20-Inch Wheels
Color: Red
Features
- L80 is a fully park, street or dirt worthy freestyle BMX bike, Hi-Ten steel 9 inch rise handlebar that will make you stand out at the bike park, Suggested rider height is 56 - 6'0".
- Ultra-durable Mongoose 4130 Chromoly front triangle, along with removable brake mounts and a mid BB shell, with a top tube length of 20.75 inches
- Drivetrain features 175 mm 3-piece tubular chromoly hollow spindle cranks with a 25T steel chainring and mid sealed bearing bottom bracket.
- Wheelset features 20 x 2.3 tires mounted on wide 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 4130 chromoly handlebar and fork are joined by a 50 mm stem and threadless sealed integrated headset for maximum steering performance.
Specs & Other Info
| Specification | Details |
|---|---|
| Bike Category | BMX Bike |
| Recommended Age Group | Big Kid |
| Manufacturer | Mongoose |
| Gears | Single Speed |
| Hue | Red |
| Tire Diameter | 20 Inches |
| Body Material | Chromoly Steel |
| Type of Suspension | Rigid |
| Key Features | Freestyle, Lightweight Aluminum Frame, BMX |
| Package Contents | Mongoose Legion L80 Freestyle BMX Bike |
| Wheel Measurement | 20-Inch Wheels |
| Braking System | U Brake |
| Activity Type | Trail Riding |
| Weight | 26.46 Pounds |
| Design Model | L80 |
| Product Line | Legion BMX |
| Manufacturing Year | 2020 |
| Package Dimensions | 48.75 x 23 x 8.5 inches |
| Product Dimensions | 23.62 x 8.66 x 48.82 inches |
| Warranty | Limited lifetime warranty on frame, 1 year on parts |
| Material Type | Steel |
| Intended User | Unisex-Adult |
| Handle Type | Mongoose MushXL, 160 mm |
Frequently asked questions
The Mongoose Legion Freestyle BMX Bike is best suited for advanced-level or professional riders. Its design and features cater to those who have considerable experience and are looking for a bike that can handle the demands of high-level freestyle BMX riding.
The Mongoose Legion is equipped with a 4130 Chromoly frame, which is known for its strength and lightweight properties, making it ideal for performing tricks and stunts. Additionally, the 20-inch wheels offer the agility and speed needed for competitive riding and complex freestyle moves.
Yes, the Mongoose Legion Freestyle BMX Bike is designed to be used by both adult men and women. Its versatile frame and setup make it a great choice for any rider looking for a high-quality, performance-oriented BMX bike.
While primarily designed for BMX freestyle and advanced riding, the Mongoose Legion is versatile enough to be used for everyday riding. Its durable construction and comfortable design make it suitable for daily commutes or casual rides, although its features are optimized for freestyle performance.
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Top Amazon Reviews
🚀 Abunda's Overview
This is our summary and key points to consider based on customer reviews.
The reviews for the BMX bike highlight its solid construction and value for money, especially when purchased at a discount. Long-term BMX riders and new users alike appreciate the bike's full 4130 chromoly frame, fork, and bars, which offer a strong starting point for customization. The bike's comfort and suitability for both beginners and intermediate riders are repeatedly mentioned, alongside its smooth ride over various terrains. However, there are criticisms about the unsealed front wheel and the quality of some components like the sprocket and chain, which may require upgrades for optimal performance.
Pros
- 🚲 Full 4130 chromoly frame, fork, and bars for durability
- 🔧 Sealed rear wheel, mid bottom bracket, and internal headset contribute to a smooth ride
- 👍 Comfortable stock pivotal seat
- 🚀 Suitable for beginners and intermediate riders, as well as experienced BMX riders looking for a reliable secondary bike
- 💰 Great value for money when on sale or discount
Cons
- ❌ Unsealed front wheel might be considered a downside at the bike's full asking price
- ⚙️ Some components like the sprocket and chain are mass-produced and may require upgrades
- 🛠 Assembly might be challenging for some, requiring attention to detail before use
Should I Buy It?
If you are looking for a solid BMX bike that offers a good foundation for future upgrades and doesn't break the bank, especially on sale, this could be a great option. It's well-suited for both new riders and those returning to BMX, offering durability and a smooth ride. However, be prepared to potentially upgrade some parts for the best experience.
Style: L100
Size: 20-Inch Wheels
Color: Grey/Black
So, one big thing to note with this bike is that the bolts on the wheels are not the most common kind. You won't be able to use the old-school type of pegs because the bolts go inward on the back. In other words, the wheels have a hole in them and the bolt needs to go through the wheel fork and peg and then into the wheel. I don't know why the wheels are threaded differently than each other, but if you plan to put pegs on this, it will involve a little more research than what I did. This is just a unique detail to note and consider. In no way does this reflect on this bike in and of itself. This bike is a beautiful work of simple design. I took off a couple of the stickers just because I love the look of the brushed gunmetal paint finish. The paint is so satiny and it really sets off the whole look of the bike with these infinity wheels. I am just an old-school grown man born in the late 70s who wants a bike that reminds me of what a bike used to be, I am not a vert ramp dude or anything like that. So, I love the single break and every effort made to design this bike for a minimal look. It is a little more heavy than I recall my childhood Huffy bike being, but I am too. What I love most with this bike is how deceptively long it is. You can have quite a bit longer arms and legs than mine (I'm average) and still do quite well with this design. My son is eight and this is clearly not a bike designed for his dimensions. My wife insisted I not get a kids bike and this my friends is certainly no kid's bike, however nostalgic it might make me feel.
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Reviewed in the United States on April 16, 2025 by Jason Harrington
Style: L100
Size: 20-Inch Wheels
Color: Grey/Black
Perfect beginner BMX. Size is really good, small lightweight bike, super durable and affordable. Can easily pick it up with one hand. Make sure you tighten everything first! Brakes are good, I like having them to stop since I am a beginner. Can always be swapped in and out in case you want to do more bar spin stuff. Tires are good, I also equipped the back with odyssey pegs
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Reviewed in the United States on May 28, 2025 by Zein Zein
Style: L100
Size: 20-Inch Wheels
Color: Blue
This review is coming from someone who has riden bmx for over 20 years, and has worked in or been a part of the bmx industry for over a 15 years now. So I know a a few things when it comes to high end, low end and everything in between. With that out of that way, let me say this, the L100 has a lot of good going for it. If managing to catch it for under $400 you can't go wrong. The full 4130 chromoly frame fork and bars is a huge step in the right direction and an excellent starting foundation if wanting to upgrade the bike in the future. The sealed rear wheel, mid bottom bracket, and internal headset are also nice, but I'll touch on those in a bit. The frame accommodates wide tires, I've pictured a 2.4" eclat fireball in the rear. The forks also have ample space for large tires as well. Stock pivotal seat is pretty comfy. Brakes feel pretty solid for stock brakes. Now, where the bike does fall short. The front wheel, it's unsealed. At the original asking price, there are other bike companies out there in this price range offering better specs. So I would have liked to see a sealed hub here. Now, the rims on these bikes are pinned instead of welded. While not a huge deal when you take in to account who this bike is marketed to, it's still something to make note of. The sprocket suffers from the "mass produced quickly" so it was rather bent causing some tight spots. Usually this is something you can't avoid on complete bikes like this. Stock chain is dainty, so I upgraded to a shadow v2 half link. There was grease on the clamp area of the stem where the bars go. I've never in my life greased that area, and I definitely recommend anyone gets one to check it before slapping the bars on. All in all, I purchased this for my wife to pedal around with me at skateparks so I wasn't expecting to be wowed. However I wasn't let down by the quality. Mongoose may be known as a department store brand, but they do have quite the bmx heritage. I think if you can score this bike on a deep discount, or sale and swap out the wheels, chain, perhaps stem and cranks at some point. You'll have a solid bike. Straight out of the bike, it's great for beginnera and intermediate or that old guy getting back in to it after years off the bike. Also, one thing to note, some of reviews are of people who bought a bmx bike and don't really understand what they bought. So for those reviews noting the chain guard or a kick stand. This isn't meant for a kickstand. And the chain guard is there because it has to be, you really aren't expected to keep it on the bike.
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Reviewed in the United States on February 24, 2023 by Kei Kei
Style: L100
Size: 20-Inch Wheels
Color: Grey/Black
The Mongoose Legion L100 was pretty easy to put together, even though the directions could’ve been a little clearer. Thankfully, most of it is self-explanatory. Once assembled, the bike rides fantastic — super smooth and the seat is surprisingly comfortable for a BMX. It’s held up great for jumps and is perfect for both freestyle tricks and casual riding. Definitely a great value for the quality!
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Reviewed in the United States on May 19, 2025 by Dawn
Style: L100
Size: 20-Inch Wheels
Color: Grey/Black
Great looking and well built bike, very comfy large seat, the color is awesome, not heavy but not too light, very durable have had for going on 5 years.
Reviewed in the United States on April 1, 2025 by D
Style: L100
Size: 20-Inch Wheels
Color: Grey/Black
I’m not sure if this is for one or the other or maybe both but this has been the worst experience of my life!! Paid almost 400 and waited to get the bike, only for the front wheel to be defective. After reaching out to the manufacturer I was to they don’t have the wheel in stock and that I have to call Adrien to find the wheel pay for it and submit for a reimbursement. After 4-5 calls I’m told that the wheel in a house wheel and they can’t get it but, I sure can buy one of their wheels for another 75 to 300. When I call Amazon back they want me to have the original packaging the bike can in to ship it back or I can take a 75 credit for the defective item and keep the bike that doesn’t work but, 75 won’t fix it. Over all the bike would be awesome if it worked but I can’t attest to that because right now it’s a 400 decoration in my garage. This was an absolute nightmare and I’ll never do it again!
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Reviewed in the United States on April 23, 2024 by Elias and Jalicia Armor Elias and Jalicia Armor