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Mongoose

Mongoose Legion Kids Freestyle Sidewalk BMX Bike, Beginner Riders, Boys and Girls, 16-20-inch Wheels, Hi-Ten Steel Frame, Micro Drive BMX Gearing

    • Based on 4,055 reviews
Condition: New
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This item's return window has been extended for the holiday season: Returnable until Jan 31, 2025

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Availability: In Stock.
Fulfilled by Amazon
Arrives Monday, Dec 2
Order within 1 hour and 29 minutes
Available payment plans shown during checkout

Color: Black/Teal


Size: 20-Inch Wheels/L10


Features

  • Legion L10 is a great first BMX bikes for beginners with standard 20 Inch wheels, the recommended rider's height is 4'4" to 5'0"
  • Durable Hi-Ten steel frame and removable brake mounts with 20 top tube length
  • Single speed drivetrain features 170 mm one-piece forged steel crank with a 25T steel chainring and American loose ball bottom bracket
  • Wheelset features 20 x 2.25 tires mounted on aluminum single wall 36H rims with 3/8 female axle front hub and 9T cog sealed bearing cassette rear hub
  • Steel U-brake and aluminum/resin brake levers provide precision speed control, while the Hi-Ten handlebar and fork are joined by a 48 mm stem and threadless sealed integrated headset for maximum steering performance

Description

For 45 years, Mongoose has been in the dirt, down the trails, and on the ramps. With the Legion Series, Mongoose offers a full line of freestyle BMX bikes for riders of all ages and ability levels. The Legion L10 is designed to be a great introduction into the world of BMX. The Legion L10 features a full Hi-Ten steel frame (20” top tube) and removable break mounts. The L10 Hi-Ten steel 8” rise handlebar and 48mm stem are designed for precision riding, while the aluminum single wall 36H rims and 2.25” BMX tires offer grip and durability. The 25x9T gearing with one-piece tubular chromoly 170 mm hollow spindle cranks and American loose ball bottom bracket offer a clean, reliable drivetrains. A steel U-brake with aluminum/resin brake levers provide speed control, while the Hi-Ten steel BMX fork with 1-1/8" threadless steerer helps maximize performance. This bike ships ready to be assembled and comes with a 5-year limited warranty on the frame and a 1-year limited warranty on parts.

Bike Type: BMX Bike


Age Range (Description): Little Kid


Brand: Mongoose


Number of Speeds: 1


Color: Black/Teal


Wheel Size: 20 Inches


Frame Material: High Tensile Steel


Suspension Type: Rigid


Special Feature: freestyle, Aluminum Frame, BMX


Included Components: Mongoose Legion L10 Freestyle BMX Bike


Is Assembly Required: Yes


Warranty Type: Limited


Color: Black/Teal


Style Name: Legion L10


Suspension Type: Rigid


Skill Level: Beginner


Bike Type: BMX Bike


Brake Style: U Brake


Number Of Speeds: 1


Specific Uses For Product: Trail


Is Autographed: No


Additional Features: freestyle, Aluminum Frame, BMX


Global Trade Identification Number: 91


Included Components: Mongoose Legion L10 Freestyle BMX Bike


UPC: 038675187191


Model Year: 2020


Manufacturer: Pacific Cycle, Inc.


Model Name: Legion Novice


Age Range Description: Little Kid


Model Number: M41900U10OS-PC


Brand Name: Mongoose


Wheel Material: Aluminum


Frame Material Type: High Tensile Steel


Item Weight: 26.14 Pounds


Wheel Size: 20 Inches


Size: 20-Inch Wheels/L10


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Monday, Dec 2

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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Similar Products

Top Amazon Reviews

    • Extremely Easy to Assemble. Bike Looks Amazing. M8x1.25 Tap May be Needed.
Color: Orange Size: 20-Inch Wheels/MAG
Review Image by Dave Dave
Review Image by Dave Dave
Review Image by Dave Dave
Review Image by Dave Dave
Review Image by Dave Dave
Review Image by Dave Dave
The bike from the pictures looked pretty cool. I didn't realize how beautiful this bike would be until it came in the mail. I purchased the Legion Mag in orange for my 8 year old. It was great to see his reaction on Christmas when receiving this bike. He was so excited. I read some other reviews from reviewers who had complaints on the difficulty of assembling the bike and in my opinion the people having trouble assembling the bike must be blatantly ignorant or illiterate. The instructions for assembly are written so a teenager could assemble this bike, with clearly labeled diagrams and more in depth explanations than what is necessary for assembly. The instructions on assembly are excellent and I had almost no trouble assembling the bike without them until it came to adjusting the brakes. I assembled the entire bike without instructions except for the brakes because it is just self explanatory. I was also able to assemble the brakes without any trouble or needing the instructions although I did refer to them for proper adjustment and alignment protocols. The only issue I had when assembling the bike is when I got to the point of attaching the handlebars to the handlebar binder assembly attached to the stem. The four socket cap screws that tighten down on the handlebar binder bracket would not thread easily. I felt as though I would break the screws or destroy the threads if I attempted to tighten them down far enough to grip the handlebars. There was too much paint in the threaded holes and also the tolerances on the machining of the threads was not great. I have included some pictures showing just how much paint was removed from tapping and also chips from burs in the threaded holes from poor tolerance drilling and tapping at the factory. In order to fix this problem I grabbed a tap handle and a M8x1.25 normal thread tap and tapped the holes. I would give this bike a 4.9 out of 5 if I could just because I needed to tap these holes and a tap was not listed as a required tool. I don't think many people will have problems assembling the bike even if they have this issue and need to tap the four holes as these are the only holes that need anything to be screwed into. Honestly if you don't at the very least know how to use a tap and die set you probably shouldn't be assembling a bike as it's not safe to do so if you're not familiar with basic tools. You could wind up hurting your child from pure negligence if you don't know how to use basic hand tools to assemble this bike properly. My suggestion is that you take it to a local bike shop and pay $30-$40 to have them assemble the bike and adjust the brakes if you don't know what you are doing. I assume some people who buy this bike will do just that with the majority of people knowing how basic hand tools work and them being able to assemble it themselves. Overall the bike is amazing, my son loves it, it was extremely easy to assemble, and I recommend you tap the holes on the handlebar binder even if it doesn't need it as it will allow you to make a more secure connection. Please don't listen to people complaining about difficult assembly as it was extremely easy even the detangler brakes something of which I've never seen or dealt with on a bike before. The instructions are very clear on how to hook the brakes up and how to adjust them properly and I was actually surprised how easy it was to assemble the brakes because I was expecting something very difficult based on the reviews but it turns out these brakes are easier to assemble than normal brakes. ... show more
Reviewed in the United States on December 30, 2020 by Dave Dave
    • Awesome Bike!
Color: Silver/L18 Size: 18-Inch Wheels/L18
I bought this bike for my 6 year old grandson. He loves riding it. I even tried it out myself. Very sturdy with easy assembly. Mongoose still makes a great product. I'm sure I will be purchasing more Mongoose BMX bikes in the future.
Reviewed in the United States on July 28, 2024 by Mimi
    • Good bike
Color: Silver/L18 Size: 18-Inch Wheels/L18
Don’t be afraid of putting it together, it really easy it took about 10 minutes. Unboxing to longer
Reviewed in the United States on October 11, 2024 by Nathan S.
    • Good with a few issues (Legion)
Color: Red Size: 20-Inch Wheels/LSX
My 8yr old son got the Legion model for Christmas. The assembly wasn't too difficult, but the instructions aren't specific to each model so the exact details are a little vague. The second thing I noticed was that the reflectors are too small to clamp on to this model, so I ordered a generic reflector set to fix. The chainguard was preinstalled but somehow broke on the second day, I removed the guard and the bike works well without it. I was happy that it came installed with a kickstand as that wasn't shown in the image. I also didn't have any trouble adjusting the breaks as others mentioned as a con. Overall I like the bike and think it's a fair value despite my few minor issues. ... show more
Reviewed in the United States on December 27, 2023 by TSM
    • Excellent bike for our son
Color: Black/Teal Size: 20-Inch Wheels/L10
We purchased a bike elsewhere and had to return it. This bike has been amazing. It works so well, easy to get put together and great quality for the money. He loves the 'tricks' he can do with this bike and seems to hold up very well, especially since he is at the age where they are pretty hard on their equipment. ... show more
Reviewed in the United States on January 13, 2024 by Mike
    • I Will NEVER buy another Mongoose
Color: Orange Size: 20-Inch Wheels/MAG
With all of the four and five star ratings, I must be the problem, right? The bike came partially dissembled for shipping purposes. I expected that. What I did not expect was: 1. Missing parts. One of the nuts and both of the washers were missing from the front wheel. Ok. A shipping problem. But what kind of washers do I need to go find? Should be simple. Just read the instructions. 2. Horrible Instructions: For example, to attach the front wheel, I need to follow the appropriate set of instructions depending if my bike's wheel is, "nutted with step retaining washer, nutted with clip retaining washer or quick release". But I don't know which one my bike is; the nut and both washers are missing. Every section is just like this; follow the set of instructions that pertain to your bike. But where does it say if the bike I purchased has a quill stem, a threadless stem, a front load stem or a top load stem? I have no idea. Mongoose has been around for a while. So there are plenty of videos on YouTube. But there are so many configurations for Mongoose bikes, good luck finding the right one. I watched a bunch of videos, went to Wal-Mart (twice) and got $30 worth of nuts, washers, hex drivers and, no I didn't go out and buy the lithium gel they recommended! Then I paid a bike shop $45 to put the thing together because I still couldn't figure it out. The bike shop wouldn't do the brakes because of liability purposes. But they showed me that I needed to loosen a nut and put the brake cable out some. Should be easy, except... 3. CHEAP parts!: I stripped a nut and two screws trying to tighten the brakes just enough to barely work. It's Christmas Eve and I'm soooo frustrated. Should I be worried? Every single step in the instruction book says that if I don't do this step correctly, someone could get seriously injured or killed. Here ya' go son. Have fun! Merry Christmas. I could call Mongoose Customer Support. They are open Monday through Friday 8 to 5; because that's when dads assemble bikes right? Sorry for all of the venting. I've had the bike for a week and I have to say, I have NEVER had this much trouble assembling something that came in a box. I've got $250 invested into a $170 bike and I don't feel safe letting my son ride it. I am not a happy customer. ... show more
Reviewed in the United States on December 25, 2020 by Jared D.
    • Great bike and at great price.
Color: Green Size: 16-Inch Wheels/L16
I bought this for my 7 year old grandson for this birthday. It was big hit and now I'm a hero! Hahaha, The build quality is excellent and the paint is amazing, it seems to go from light to dark green in the sun. It was easy to put together and with my granddaughter's help we managed to get in assembled in 20-30 minutes. Time will tell if it lasts, I might update in a year. Exceeded expectations. ... show more
Reviewed in the United States on January 19, 2023 by Donald W.

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