Search  for anything...
Mongoose

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

    • Based on 685 reviews
Condition: New
Checking for product changes
$374.88 Why this price?

Buy Now, Pay Later

As low as / mo
  • – Up to 36-month term if approved
  • – No impact on credit
  • – Instant approval decision
  • – Secure and straightforward checkout

Ready to go? Add this product to your cart and select a plan during checkout. Payment plans are offered through our trusted finance partners Klarna, PayTomorrow, Affirm, Afterpay, Apple Pay, and PayPal. No-credit-needed leasing options through Acima may also be available at checkout.

Learn more about financing & leasing here.

Selected Option

Free shipping on this product
This item's return window has been extended for the holiday season: Returnable until Jan 31, 2025

To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

Availability: In Stock.
Fulfilled by Amazon
Arrives Tuesday, Dec 31
Order within 18 hours and 11 minutes
Available payment plans shown during checkout

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

SpecificationDetails
Bike CategoryBMX Bike
Recommended Age GroupBig Kid
ManufacturerMongoose
GearsSingle Speed
HueRed
Tire Diameter20 Inches
Body MaterialChromoly Steel
Type of SuspensionRigid
Key FeaturesFreestyle, Lightweight Aluminum Frame, BMX
Package ContentsMongoose Legion L80 Freestyle BMX Bike
Wheel Measurement20-Inch Wheels
Braking SystemU Brake
Activity TypeTrail Riding
Weight26.46 Pounds
Design ModelL80
Product LineLegion BMX
Manufacturing Year2020
Package Dimensions48.75 x 23 x 8.5 inches
Product Dimensions23.62 x 8.66 x 48.82 inches
WarrantyLimited lifetime warranty on frame, 1 year on parts
Material TypeSteel
Intended UserUnisex-Adult
Handle TypeMongoose 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.

Similar Products

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.

    • Solid deal if catching it when the price is right.
Style: L100 Size: 20-Inch Wheels Color: Blue
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
    • Love My New Mongoose L100 BMX Bike
Style: L100 Size: 20-Inch Wheels Color: Grey/Black
Review Image by THCshopper THCshopper
Review Image by THCshopper THCshopper
Review Image by THCshopper THCshopper
Perfect Size Bike for Me. I'm 5'6. Smooth Ride & Feels Very Durable. Happy Satisfied Customer. Definitely Recommend. Thanks Amazon & Crew. 8/30/24. :)
Reviewed in the United States on August 30, 2024 by THCshopper THCshopper
    • It's my bike, and it's very fast!
Style: L100 Size: 20-Inch Wheels Color: Grey/Black
I bought this L100 last fall/winter with a "used, like new condition" and couldn't be happier with it. I ride it to and from work every single day. I have put it through some rough riding, jumping everything i can everywhere I go. This is my first all chromally steel bike, and I can't imagine ever getting anything but that now. I can forsee it lasting a very long time with proper maintenance and care. Just wish it had a front brake and a slightly smaller back tire, as these tires do make it harder to accelerate do to the amount of grip and friction they have. 2.4" wide tires are much much different than anything else I've ever had. I think 2.3" would be perfect on the back. Have some good lithium grease ready for the bearings on the front fork when you install. This bike has been my best friend for the past 8 months or so, and besides just regular maintenance and tightening the crank and chain once a month, and a couple flat tires repaired, it had been very reliable and indestructible as far as what I personally put it through. If you've never had an all chromally (frame, forks, handlebars, crank arms) you are in for a real treat. I would hands down buy this bike again. Either that or piece together and build my own. ... show more
Reviewed in the United States on July 27, 2021 by OhOkDave
    • pound for pound - best beginner BMX ???
Style: L100 Size: 20-Inch Wheels Color: Grey/Black
first of all - i got this bike for an "steal" open box - $320.00 prime - so my review is kinda skewed - but indeed if you can get this bike for <$500 or <$400 - i would submit it is the best pound for pound - yes i hear you - they sell mongoose at walmart (no doubt) - but look at the specs - chromolly frame, forks, and handlbars, double walled rims, integrated head bearings, pivot seat try to find this on any other "branded" bike - PK Ripper,GT, WTP, Cult, Subrosa, and Kink (on a side note the Kink Whip) is about as close as one can come - but the 2022 models are gone and now the 2023 models are $529.00 again - my review is a bit skewed - as frankly i got an open box steal - indeed box was damaged - but bike was 100% new - look i aint no serious rider - just enjoying my inner 12 year old on side note (being 5-8) - for me the seat post is a wee low at 270 mm - so i ordered a 320mm to replace it but again no major tricks here - just street cruising - so each to their own... cheers UPDATE !! - price today 8-23-22 ($382.00) - not prime - but indeed pick this steal up !!!! again pound for pound - compare the specs to any other BMX on Amazon or and other BMX bikes - GT, Redline, WTP, Subrosa, Cult - you simply cannot do any better !!! ... show more
Reviewed in the United States on August 15, 2022 by rube
    • Waste of money.
Style: L100 Size: 20-Inch Wheels Color: Green
Review Image by Don’t even bother buying this. They send it with NONE of the tools needed to assemble and even after buying all kinds of tools just to put this foolishness together, it still is no good. Wheel bolt is so stuck you’ll damage the bike before being able to get it on. SKIP THIS PRODUCT. Don’t even bother buying this. They send it with NONE of the tools needed to assemble and even after buying all kinds of tools just to put this foolishness together, it still is no good. Wheel bolt is so stuck you’ll damage the bike before being able to get it on. SKIP THIS PRODUCT.
Don’t buy this product. They send it with NONE of the tools needed for assembly and even after buying all kinds of tools the front wheel bolt is so jammed you will break the bike before being able to assemble it. Terribly inconvenient and useless.
Reviewed in the United States on July 25, 2024 by Don’t even bother buying this. They send it with NONE of the tools needed to assemble and even after buying all kinds of tools just to put this foolishness together, it still is no good. Wheel bolt is so stuck you’ll damage the bike before being able to get it on. SKIP THIS PRODUCT. Don’t even bother buying this. They send it with NONE of the tools needed to assemble and even after buying all kinds of tools just to put this foolishness together, it still is no good. Wheel bolt is so stuck you’ll damage the bike before being able to get it on. SKIP THIS PRODUCT.
    • Awesome Purchase!
Style: L80 Size: 20-Inch Wheels Color: Teal
This bike was a little pricey but compared to local retailers it was a good deal. My husband loves this bike. He is outside all the time with our boys. He said it’s a smooth ride and handles east!
Reviewed in the United States on June 21, 2024 by Amazon Customer
    • Brings me back to my early teenage years
Style: L80 Size: 20-Inch Wheels Color: Teal
I absolutely love this bike. It's very light compared to others that I used to ride. Being 32 now I feel as if the 15 year old self has come out to play (warriors). It is ultra smooth ride at the given proce you can't beat it. I'm 5'8 and the l80 for 250 is a screaming deal and it's perfect at my height. I know this bike isn't meant to be fully seated rides but you definitely will need a better seat if your looking for longer rides. I mostly stand though but honestly I take this baby out for a good 10miles daily and am very pleased with the quality of the bike! ... show more
Reviewed in the United States on May 17, 2023 by Mark

Can't find a product?

Find it on Amazon first, then paste the link below.