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 687 reviews
Condition: New
Checking for product changes
$298.00 Why this price?

Buy Now, Pay Later

As low as $49.67 / mo
  • – 6-month term
  • – 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

30-day refund/replacement

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: Only 1 left in stock, order soon!
Fulfilled by Amazon
Arrives Wednesday, Mar 12
Order within 9 hours and 48 minutes
Available payment plans shown during checkout

Style: L100


Size: 20-Inch Wheels


Color: Green


Features

  • L100 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 quarterpipe, Suggested rider height is 5'8" and Up
  • Extreme durability, Mongoose full 4130 Chromoly frame, removable brake mounts, mid BB shell, featuring a 21 top tube length
  • Drivetrain features 175 mm two-piece tubular chromoly hollow spindle cranks with a 25T aluminum chainring 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 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.

Bike Type: BMX Bike


Age Range (Description): Big Kid


Brand: Mongoose


Number of Speeds: 1


Color: Green


Wheel Size: 20 Inches


Frame Material: Chromoly Steel


Suspension Type: Rigid


Special Feature: freestyle, Aluminum Frame, BMX


Included Components: Bike


Bike Type: ‎BMX Bike


Age Range (Description): ‎Big Kid


Brand: ‎Mongoose


Number of Speeds: ‎1


Color: ‎Green


Wheel Size: ‎20 Inches


Frame Material: ‎Chromoly Steel


Suspension Type: ‎Rigid


Special Feature: ‎freestyle, Aluminum Frame, BMX


Included Components: ‎Bike


Size: ‎20-Inch Wheels


Brake Style: ‎U Brake


Specific Uses For Product: ‎Freestyle BMX riding, Street riding, Dirt jumping


Item Weight: ‎12 Kilograms


Style: ‎L100


Model Name: ‎Legion BMX


Wheel Material: ‎Aluminum


Year: ‎2022


Seat Material Type: ‎Rubber


Warranty Type: ‎Limited


Assembly Required: ‎Yes


Is Autographed: ‎No


Number of Handles: ‎2


UPC: ‎038675218611


Manufacturer: ‎Pacific Cycle, Inc.


Item Package Dimensions L x W x H: ‎49 x 23.5 x 9 inches


Package Weight: ‎16.03 Kilograms


Item Dimensions LxWxH: ‎24.41 x 9.06 x 53.15 inches


Brand Name: ‎Mongoose


Warranty Description: ‎Limited Lifetime


Material: ‎Steel


Suggested Users: ‎unisex-adult


Part Number: ‎M41201U10OS


Date First Available: November 12, 2020


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Wednesday, Mar 12

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.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Similar Products

Top Amazon Reviews

    • 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
    • Legions are perfect!!! l40-l500 series
Style: L100 Size: 20-Inch Wheels Color: Blue
mongoose l80: first off Mongoose in some people's eyes are trash, but like like many brands carry a wide range of bikes (types, sizes and quality) yes they do have the low end bottom barrel walgoose models, then models like the fraction and legion series. Just know what you want and what your buying. The legion series is GREAT, designed for beginner to advanced BMX riders, yes it can be used as a commuter bike but may not be the most comfortable as in the fixed seat models are designed for trick and stunt riding, in my opinion from the l10 to the l40 (specifically) should come with adjustable height and angle seat as this is typically for a younger beginner rider, the l60 and above are for the more experienced to advanced riders. The l80 has been perfect for learning manuals, hops, fakies 180"s and crankflips for a 13 yr old 5'5. own the l60, l80, and l100 all are beautiful and completely changed my perspective on the Mongoose BMX, yes a part may beak (should not arrive broke) but part of BMX is upgrading your bike and making it better and stronger!! Definitely recommend the legion series based on rider height age and experience. ... show more
Reviewed in the United States on August 9, 2020 by Amazon Customer
    • 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
    • best quality at this price range
Style: L500 Size: 20-Inch Wheels Color: Silver
Review Image by Ben Ben
Review Image by Ben Ben
Review Image by Ben Ben
Review Image by Ben Ben
Pros: best config you can get at this price range. Chromoly frame, fork and handlebar, sealed bearing for front and rear hub, freecoaster rear hub. (other brand like WTP, fly kink may cost you double for this config). Easy to assembly (just install the handlebar, padel, front wheel and seat). It come with a U brake and is suitable to install Gyro, but I took off the brake cos I run brakeless at park. Cons: Made in China by pacific bicycle, and 21 inch frame (suitable for 5'11 or above I guess). ... show more
Reviewed in the United States on December 17, 2019 by Ben Ben
    • Don't waste your time or money
Style: L100 Size: 20-Inch Wheels Color: Grey/Black
Review Image by Amazon Customer Amazon Customer
This could be a good bike, but careless packing, shoddy assembly, and poor service makes it a waste. It came with nicks, dings, and scratches on the rims, some glue stuck on it in a few places, some scratches, and worst of all, the plastic bracket that holds the chainguard in place messed up the paint (see picture). Amazons only option (after cutting all the 15 or so zip ties, and removing the foam and cardboard wrapping) was to somehow repack everything and send it back, and Mongoose's absolutely ridiculous response was to find some nail polish of the same color and paint over it. Very disappointing purchase. ... show more
Reviewed in the United States on August 6, 2023 by Amazon Customer Amazon Customer
    • 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
    • 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
    • Outstanding Bike!!
Style: L80 Size: 20-Inch Wheels Color: Teal
Great bike!! I was so concerned with all of the less than great reviews (regarding used parts, missing parts, damaged areas, etc...)... The bike shipped to me was wrapped very well for long term storage, and shipping as well... Easy to put together (if you know even a little about how to do so), and has detailed instruction manual as well - for great reference and usage information... This bike (Legion L500 Teal/purple-blue) is a great bike with a very appealing color scheme as well... Bought this for my daughter's 10th birthday, and I don't think she will need another BMX style bike for a few years to come!! Great purchase and seller did great getting it to me in the best shape possible, in the least amount of time possible!! 👍 ... show more
Reviewed in the United States on November 23, 2021 by Siggy

Can't find a product?

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