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Mongoose

Mongoose Legion Freestyle BMX Bike for Advanced-Level or Professional Riders, Adult Men Women, 4130 Chromoly Frame, and 20-Inch Wheels

  • Based on 709 reviews
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Availability: In Stock.
Fulfilled by Amazon
Arrives Saturday, Jun 21
Order within 18 hours and 30 minutes
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Style: L500


Size: 20-Inch Wheels


Color: Silver


Features

  • L500 is a fully park, street or dirt worthy freestyle BMX bike, beginner level curb jumps all the way up to advanced aerial tricks on a quarter pipe, Suggested rider height is 5'8" and up.
  • Extreme durability, features a Mongoose full 4130 Chromoly frame with removable brake mounts and mid BB shell, featuring a 21 top tube length
  • Drivetrain features 175 mm two-piece tubular chromo hollow spindle cranks with a 25T aluminum chain ring and mid sealed bearing bottom bracket.
  • Wheelset features 20 x 2.4 tires mounted on wide aluminum double wall 36H rims with 3/8 female axle front hub and 9T cog sealed bearing free coaster 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 thread less sealed integrated headset for maximum steering performance.

Bike Type: BMX Bike


Age Range (Description): Big Kid


Brand: Mongoose


Number of Speeds: 1


Color: Silver


Wheel Size: 20 Inches


Frame Material: Chromoly Steel


Suspension Type: Rigid


Special Feature: freestyle, Aluminum Frame, BMX


Included Components: Mongoose Legion L500 Freestyle BMX Bike


Bike Type: ‎BMX Bike


Age Range (Description): ‎Big Kid


Brand: ‎Mongoose


Number of Speeds: ‎1


Color: ‎Silver


Wheel Size: ‎20 Inches


Frame Material: ‎Chromoly Steel


Suspension Type: ‎Rigid


Special Feature: ‎freestyle, Aluminum Frame, BMX


Included Components: ‎Mongoose Legion L500 Freestyle BMX Bike


Size: ‎20-Inch Wheels


Brake Style: ‎U Brake


Specific Uses For Product: ‎Trail


Item Weight: ‎11 Kilograms


Style: ‎L500


Model Name: ‎Legion BMX


Power Source: ‎Pedal power (human energy transferred through a drivetrain)


Wheel Material: ‎Aluminum


Year: ‎2020


Seat Material Type: ‎Nylon" or "Plastic


Warranty Type: ‎Limited


Maximum Weight Recommendation: ‎72.8 Pounds


Assembly Required: ‎No


Is Autographed: ‎No


Number of Handles: ‎2


Global Trade Identification Number: ‎61


Minimum User Height: ‎68 Inches


UPC: ‎038675187061


Bicycle Drivetrain Type: ‎Chain-driven


Manufacturer: ‎Pacific Cycle, Inc.


Item Package Dimensions L x W x H: ‎48.6 x 23.5 x 10.3 inches


Package Weight: ‎16.15 Kilograms


Brand Name: ‎Mongoose


Warranty Description: ‎Limited lifetime warranty on frame and one year warranty on parts


Material: ‎Aluminum


Suggested Users: ‎unisex-adult


Number of Items: ‎1


Part Number: ‎M41100U10OS-PC


Date First Available: August 6, 2019


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Saturday, Jun 21

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews

    • Simple beauty for a grown person
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. ... show more
Reviewed in the United States on April 16, 2025 by Jason Harrington
    • Perfect starter bmx
Style: L100 Size: 20-Inch Wheels Color: Grey/Black
Review Image by Zein Zein
Review Image by Zein Zein
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 ... show more
Reviewed in the United States on May 28, 2025 by Zein Zein
    • Solid deal if catching it when the price is right.
Review Image by Kei Kei
Review Image by Kei Kei
Review Image by Kei Kei
Review Image by Kei Kei
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. ... show more
Reviewed in the United States on February 24, 2023 by Kei Kei
    • Great Ride – Perfect for Jumps and Cruising!
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! ... show more
Reviewed in the United States on May 19, 2025 by Dawn
    • Great looking bike for the money
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
    • Worst experience ever!!
Style: L100 Size: 20-Inch Wheels Color: Grey/Black
Review Image by Elias and Jalicia Armor Elias and Jalicia Armor
Review Image by Elias and Jalicia Armor Elias and Jalicia Armor
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! ... show more
Reviewed in the United States on April 23, 2024 by Elias and Jalicia Armor Elias and Jalicia Armor
    • Easy to assemble teenager happy
Style: L80 Size: 20-Inch Wheels Color: Red
Package arrived
Reviewed in the United States on February 17, 2025 by Jason Staples

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