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🚀 Own the ramps, streets, and trails with the Mongoose Legion L40 — where every ride is a statement.
The Mongoose Legion L40 is an intermediate freestyle BMX bike designed for riders 5’0"-5’6" seeking a versatile, durable ride. Featuring a Hi-Ten steel frame, 20-inch wheels with grippy 2.3" tires, and a high-performance Micro Drive 25x9T gearing system, it excels on park, street, and dirt terrains. Precision aluminum U-brakes and chromoly cranks ensure control and power, while a 5-year frame warranty guarantees lasting performance.















| ASIN | B07G1CS5QF |
| Additional Features | Aluminum Frame, BMX, freestyle |
| Age Range (Description) | Big Kid |
| Age Range Description | Big Kid |
| Best Sellers Rank | #458,671 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #356 in Kids' Bicycles |
| Bicycle Drivetrain Type | Single-speed |
| Bicycle Gear Shifter Type | Trigger |
| Bike Type | BMX Bike |
| Brake Style | U Brake |
| Brand | Mongoose |
| Brand Name | Mongoose |
| Color | Black |
| Customer Reviews | 4.3 out of 5 stars 1,064 Reviews |
| Derailleur Configuration | Rear |
| Frame Material Type | Alloy Steel |
| Gear Type | cassette |
| Global Trade Identification Number | 00038675158092 |
| Included Components | Bicycle |
| Intended Riding Terrain | BMX Terrain |
| Item Type Name | BMX Freestyle Bike |
| Item Weight | 34.4 pounds |
| Manufacturer | Pacific Cycle, Inc. |
| Minimum User Height | 5 feet |
| Model Name | Legion Intermediate |
| Model Number | M41509M10OS-PC |
| Model Year | 2023 |
| Number Of Speeds | 1 |
| Number of Handles | 1 |
| Number of Speeds | 1 |
| Seat Material | Mongoose Unifier |
| Size | 20-Inch Wheels/L20 |
| Specific Uses For Product | Trail |
| Style Name | L20 |
| Suspension Type | Rigid |
| UPC | 038675158092 |
| Warranty Description | Limited LIfetime |
| Warranty Type | Limited |
| Wheel Material | Aluminum |
| Wheel Size | 20 inches |
J**N
This bike is amazing!
I cannot say enough good things about this bike. My son saved his money to pay for it himself and it’s worth every penny. He is 11, it fits him perfectly. It rides so smooth and so sturdy. The brakes are amazing. It was very easy to put together. The best part is the sleek look!
A**Z
YOU NEED TO BE A BIT TOOL SAVVY
Not a bad bike my son truly enjoys it. Quite sturdy and I can see the bike handle well and looks pretty durable. As far as assembly I’ve worked with tools before so it’s low level know how when it comes to assembling this bicycle. I did notice some people having issues with the rear pegs. These pegs require you to remove the bolts from the rear tire and add bolts after placing the pegs. I’m sure if you search videos on how to install it properly you will see how easy it can be. I suggest searching a video since the instruction manual can be a bit tricky.
M**Y
you need tools to assemble! No tools included
this bike is affordable and of great quality. My 10 year old loves it! It comes pre-assembled but you need real tools to finish putting it together. it looks like it will last a long time, material seemed to be of good quality. we took it for a ride after 3 days since I needed tools to have it ready. it is worth every penny. definitely recommend it.
D**S
Nice looking bike
My son needed a new bike and wanted something that looked “cool”. He was very excited to receive this. Good size for 9 year old. Good quality and price for what you’re getting.
M**3
Must Have a Faulty Break Line!!
Please when ordering this bike have a professional check the breakline and break handle before letting your child or loved one ride it. My 11 year old son worked very hard for several months saving up money to purchase this bike only to be let down twice and end up with some pretty bad concrete burn on his knees, elbows and hands. We are on our second bike of this model because the first ones break line was too short to finish assembly so Amazon picked that one up and sent us another one. (that arrived 2 days later then promised) When we received the second one we were able to complete assembly but when my son tried to ride it for the first time he had a pretty bad crash caused from the faulty breakline. When he tried to pull the break handle the breakline ripped through the handle which caused the breaks not to work and since he was unable to stop the bike he crashed. I took the bike to the same bike shop I had taken the first one and they said that the bike was assembled correctly and that they were able to see where the breakline ripped through the break handle and that should not have ever happened. They also sais that since this was the second bike that I had brought to them with this same issue that there must be something wrong at the manufaturer with the breaklines for this bike model. So again, if you purchase this bike make sure you check and double check the safety features on this bike before anyone rides it.
R**S
Great bike,
I thought produçts of this size would have been put completely together to be sure that everything would work properly, meaning that the plastic brackets aren't a great idea, saves you money but takes away from quality, plus the rear pegs had no threads so can't be used, I would have given 5 stars but because of some of the parts quality was a let down, overall tho my son loves the bike and he's able to get around much quicker now,, if this is read by support or owners or at least someone who can get the word to the right ppl,, all products might need put together ahead of time and then taken apart and boxed, that way you will be able to fix the issues of pieces that are sub par and pieces that won't work at all,, he is able to use the front pegs if needed,, overall he loves the bike and is very happy, it would have been 10 stars if possible to rate it that, and if the little pieces on the bike that should have been better quality like back when they first came out, paying higher prices sucks, but as long as all the parts are of good quality, plastic is very easy to strip and break, just saying it would be a good idea to think about replacing it all, I also had a mongoose as a child, love the goose and so does my son, thank you for a great bike
B**D
Solid beginner BMX
Its a good, solid beginner BMX bike for kids or small adults. If you have a little bit more money, id go for something from a more reputable brand or higher in the legion series to get the full chromoly frame and better components. Its noticeably heavier than my kink gap xl. But for a kid who is just getting interested in BMX and not even sure she's gonna be getting crazy at skateparks and on the street, this is a great bike. We are going to upgrade the pedals asap because the ones that came on it don't offer much grip.
A**R
Well worth the money!
Overall great buy! I shopped for a decent priced good quality Bmx bike for my son for months before settling on this one and glad I did, from $ 100.00 bikes at walmart to $ 4-500.00 name brand bikes at local bike shops the quality in this bike is equally as good as the high dollar ones being sold for 400+. Purchased for my 10 year old son and he loves it, perfect size for him to ride around on now but big enough to allow for growth as well.
F**E
For the price, it’s real good
I got it retailed for quite of a good deal below $400. And I’ve been using this BMX for a solid 3 months here and there and it doesn’t really disappoint, as long as you greased the metal parts, it’s smooth as butter The instructions on the brakes could and bearings of the handle could be more accurate and clearer though And the bikes itself seems to be a little heavier than a typical BMX. That’s the only issue I ahve with it, the weight. But nonetheless it’s overall a decent bike
D**O
Buen producto
Todo muy bien, solo que el brazo donde van los pedales no tenían la rosca, tuve que mandar hacerla en un taller.
G**E
Well made bike for the price
Very nice bike that feels well made and very solid. Was easy to put together.
J**J
Amazing!
Amazing bike, there are no words for how happy our son (and us as parents) are with this! Colours, style, size and quality as advertised. Worth every penny!
A**A
Awesome bike
Bought for my 8 year old and he absolutely loves it! He rides it with ease and I can ride it as an adult as well that that is another bonus
Trustpilot
2 weeks ago
2 weeks ago