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Mongoose Legion Kids Freestyle BMX Bike, Intermediate Rider, Boys and Girls Bikes, 20-Inch Wheels, Hi-Ten Steel Frame, Micro Drive 25x9T BMX Gearing

4.4 4.4 out of 5 stars 2,963 ratings

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Size Chart
US freestyle BMX bike
Brand SizeRider Height (in)Wheel Size (in)
L 2056 - 6420
L 4060 - 6620
L 6060 - 6620

About this item

  • L20 is a stylish freestyle BMX bike that offers everything a beginning rider needs to hit the streets and pop off curbs, Suggested rider height is 4’8”-5’4”
  • Built to last with its Hi-Ten steel frame, removable brake mounts, and a top tube length of 20.25 inches
  • Boasts a high-performance drivetrain equipped with 170mm one-piece forged steel cranks, a 25T alloy chainring, and an American loose ball bottom bracket
  • Wheelset is equipped with 20” x 2.3” tires mounted on aluminum single wall 36H rims with 3/8” female axle front hub and 9T cog sealed bearing cassette rear hub
  • Single rear aluminum U-brake and brake levers provide precision speed control, while the Hi-Ten steel handlebar and fork are joined by a 50mm stem and threadless sealed integrated headset for maximum steering performance

From the manufacturer

Mongoose hero with a young man doing a bike trick
Legion BMX Intermediate with copy about the bike

black and teal bike bike bmx inch bikes kids boys mongoose bicycle girls mountain wheels old men

L10

brown and black boy wheel year bicicleta training dirt adult freestyle legion para electric frame

L20

copper bike tire ages bicycles big black gt adults accessories diamondback fat parts cruiser

L40

black and silver bike fat parts cruiser bicicletas girl scooter red tires mens age pegskid mini

L60

matte black bike balance toddler blue speed haro trick huffy schwinn cheap se

L100

Customer Reviews
4.4 out of 5 stars
3,971
4.4 out of 5 stars
2,963
4.4 out of 5 stars
2,963
4.4 out of 5 stars
2,963
4.3 out of 5 stars
635
4130 CHROMOLY FRAME TUBE
4130 CHROMOLY FORK/HANDLBAR
TUBULAR CHROMOLY CRANKS
SEALED CARTRIDGE CRANK BEARING
MICRO DRIVE GEARING
SEALED BEARING REAR HUB
Mongoose 50th BMX

Product 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 L20 was designed to be a fully park, street and dirt worthy BMX bike. The Legion L20 features a Hi-Ten steel frame (20.25” top tube), tapered headtube, and removable brake mounts. The L20 Hi-Ten steel 8” rise handlebar and 48mm stem are designed for precision riding, while the wide aluminum single wall 36H rims and 2.3” BMX tires offer grip and durability. The 25x9T gearing with one-piece tubular chromoly 170mm hollow spindle cranks and American loose ball bottom bracket offer a clean, reliable drivetrains. An alloy U-brake with alloy brake levers provide speed control, while the Hi-Ten Steel BMX fork with 1-1/8" threadless steerer and taper leg 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.

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Customer reviews

4.4 out of 5 stars
4.4 out of 5
2,963 global ratings

Customers say

Customers like the value, ease of use, and weight of the bicycle. For example, they mention it's a well built bike with great features and a nice smooth ride. That said, some complain about missing parts and braking issues. Opinions are mixed on ease of assembly, seat size, and quality.

AI-generated from the text of customer reviews

72 customers mention51 positive21 negative

Customers like the value of the bike. They say it has great features for the price, is well built, and is a good bike for the money. Some customers also mention that the bike is okay with only one complaint being the seat.

"...Congrats to all who got the L60 in grey at a great price. Thanks Amazon for the super ai deals and Mongoose for still making and baking." Read more

"...Excellent quality for the money. If you're looking for a reasonably priced freestyle bike with good quality, at $156, this is a great choice." Read more

"...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..." Read more

"...The bike itself seems to be high quality. It looks like an expensive bike and the color is very cool. It's not the cheap Mongoose you see at Walmart...." Read more

26 customers mention21 positive5 negative

Customers like the weight of the bicycle. They mention that it's not too heavy, rides super smooth, and is easy to build and learn. Some say that it is the perfect size and weight for basic tricks. Overall, most are happy with the weight and feel of the bike.

"...I could not find out what the exact material the frame is, but it is very light...." Read more

"...The Title series with a lengthened seat post makes for a great lightweight cruiser.Not much to complain about on this bike...." Read more

"...I have even taken his bike for a few spins and it’s the perfect size and weight for your basic tricks and jumps...." Read more

"...It is very light weight this gives my son a edge with his new BMX Bike...." Read more

19 customers mention14 positive5 negative

Customers like the ease of use of the bicycle. They mention that it rides great, is easy to ride, and is pretty good for cruising. Some say that the back pegs are smooth and not threaded.

"...The Legion L20 is reasonably light at roughly 25 lbs., easy to ride, and looks great...." Read more

"...He said this bike seems heavy but rides very smoothly. His only complaint is the whistling from the hollow stem bolt while he rides...." Read more

"...My son was bummed. Overall, the bike looks great but we’ve had issues with the tires, brakes and now a broken chain...." Read more

"Pros: Nice and sturdy once assembled. Very sharp looking too. Drives smooth.Cons: the brake line is too short...." Read more

179 customers mention123 positive56 negative

Customers are mixed about the quality of the bicycle. Some mention it's a quality bike, while others say that the parts quality was a let down. They mention that the bike came with missing pedals and broken pieces. Some customers also say that low quality alloys were probably used.

"...All around, I am impressed with the bike. The paint job had a nice detail in it near the welds to mimic a heat blemish, which is a throwback to the..." Read more

"...Arrived quickly, packaged well, everything is in perfect condition, so yeah, I'll excuse one little minor smudge. Thank you Mongoose!!!!" Read more

"...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..." Read more

"I am very happy with the purchase. It is a quality bike." Read more

80 customers mention48 positive32 negative

Customers are mixed about the ease of assembly of the bicycle. Some mention it's pretty easy to assemble, while others say the build instruction is terrible and a pain to put together. The instructions are for several different models making them useless.

"...They feel a little tight out of the box. This is super easy to do yourself, but if you’re unsure, just take it to a bike shop." Read more

"...it does every version of the bike a disservice by not actually explaining things very well or at all in the case of the brake cable installation for..." Read more

"...Assembly was very easy on all three bikes; just need to attach the front wheel, handle bars, and pedals. Took only about 15 mins...." Read more

"...The bike came semi put together which made assembly pretty easy...." Read more

20 customers mention8 positive12 negative

Customers are mixed about the seat size. Some mention that it's a perfect fit for them, while others say that the nuts they sent were not the correct size.

"...The bike feels small. Kids bike small. I am not tall and the L60 says it should fit an adult up to 5'6"...." Read more

"...Everything is very stout and tight. I would not personally hesitate to take this bike to the park and jump it… Which I did...." Read more

"...Update: the nuts they sent were not the correct size. Avoid buying this bike." Read more

"...The seat is also fine and comfortable he says. Brake line was already connected. Not sure what people expect for price. Super bike for kids...." Read more

43 customers mention0 positive43 negative

Customers are dissatisfied with the braking of the bicycle. They mention that the brakes are weak, they fell apart after a week of use, and there is no coaster brake on this model.

"...The L60 does not come with pegs but the front axle will accept 3/8 pegs or the Mongoose Freestyle Steel Pegs...." Read more

"...Rear pegs have no threading to simply spin them on. Rear pegs do not have holes in them for screwdriver to slide in to tighten...." Read more

"...No pegs included. No gyro for the handlebar brake, so you cannot spin the handlebars to do tricks...." Read more

"...All components except brakes are good quality. The brakes are the only issue...." Read more

32 customers mention0 positive32 negative

Customers are disappointed with the bicycle's missing parts. They mention that the pedals wouldn't screw, the bike was broken, and the sealed box had missing parts! Some customers also mention that there are pieces missing to install the bike, and that the seat and other parts are missing.

"My son received this bike and was so excited. It came with missing pedals! Broken pieces and no assembly instructions!..." Read more

"Ordered the bike for my 9 year old son. Came without the nuts and bolts to attach the front wheel and without the seat clamp...." Read more

"...Pretty easy to put together, that said was missing a screw for the bike seat but not a big deal as we have extras. Well built bike for the price...." Read more

"...When I received it there were scratches on it, missing parts and the pedals wouldn’t screw in due to the holes being stripped...." Read more

Good quality
5 Stars
Good quality
I like this bike. The built quality is great. I change the seatpost and the seat.
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Top reviews from the United States

Reviewed in the United States on May 25, 2023
Color: GreySize: 20-Inch Wheels L60Verified Purchase
Customer image
5.0 out of 5 stars Great Quality for the price!
Reviewed in the United States on May 25, 2023
Let me be up front, I paid $179 for this bike. It is the gray L60. I just looked again and the bike is now listed for almost $350. I’m not sure I would pay that for this bike. Not because it’s not worth that, but because I would probably buy a higher end brand for the same price. But, that’s just me.
I bought this for my son on his 9th birthday. He is very tall for his age at a little over 5 feet. According to the specs, he would be on the bottom end of the height range for this bike and it fits him perfectly. I am 6’ 2”, 250 pounds and I wouldn’t hesitate to buy this bike for myself based on the dimensions. The handlebars are a really nice height for me to ride.
I could not find out what the exact material the frame is, but it is very light. I was hoping to get him a Chromoly frame, and I would say that this would fit in that weight range. Everything is very stout and tight. I would not personally hesitate to take this bike to the park and jump it… Which I did. The crank did not flex at all, and I really love how fat the tires are. All around, I am impressed with the bike. The paint job had a nice detail in it near the welds to mimic a heat blemish, which is a throwback to the old days, when chrome bikes were welded and the heat would blemish the chrome and turn it a rainbow color.
The only Cons that I really found with the bike was under the fork where the neck stem passes through the fork and is welded in place, there was a really bad cut and weld. There are also a hint of rust on a few parts of the bike. I’m assuming from being shipped overseas from China. The metal Mongoose decal for the front of the head stem was a stick on thing. It may be that kids these days want a clean look and they did that as an option.
Other than those things, I can’t find anything else mechanically or geometrically wrong with the bike. To be clear, this is not a Walmart licensed product. This is a mongoose bike produced by mongoose or the company that owns mongoose.
p.s. it wouldn’t be a bad idea to make sure that the neck, crank and wheel hubs are all at the correct tightness. They feel a little tight out of the box. This is super easy to do yourself, but if you’re unsure, just take it to a bike shop.
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20 people found this helpful
Report
Reviewed in the United States on May 2, 2023
Color: GreenSize: 20-Inch Wheels L60Verified Purchase
3 people found this helpful
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Reviewed in the United States on March 15, 2024
Color: BlueSize: 20-Inch Wheels L20Verified Purchase
Reviewed in the United States on June 7, 2023
Color: BlackSize: 20-Inch Wheels L20Verified Purchase

Top reviews from other countries

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Alexandre
5.0 out of 5 stars Est ce que quelqu'un sait où se procurer pneu original.
Reviewed in Canada on March 16, 2024
Color: BlackSize: 20-Inch Wheels L20Verified Purchase
Astrya
4.0 out of 5 stars Bon pour débuter
Reviewed in France on September 10, 2023
Color: PurpleSize: 20-Inch Wheels L40Verified Purchase
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Astrya
4.0 out of 5 stars Bon pour débuter
Reviewed in France on September 10, 2023
La taille est bonne, bmx de bonne facture, cependant des roulements scellé serait bien mieux ;) et j'aurai pas dit non à un rotor.
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Andre Kempe
5.0 out of 5 stars Hält sogar Autos stand
Reviewed in Germany on May 14, 2023
Color: TealSize: 20-Inch Wheels L60Verified Purchase
Jack Myles
4.0 out of 5 stars Missing a Nut
Reviewed in Canada on February 11, 2021
Color: BlueSize: 20-Inch Wheels L60Verified Purchase
Rene Reutlinger
5.0 out of 5 stars Good bike.
Reviewed in Canada on January 15, 2021
Color: TealSize: 20-Inch Wheels L60Verified Purchase