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Racing Boy 300 Kids' 20-Inch Mountain Bike 6-8 Years

Sale price: 15.250 KD Regular price:
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Sale price: 15.250 KD Regular price:
Model: 8339604

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Product Features

A photo of the Racing Boy 300 Kids' 20-Inch Mountain Bike 6-8 Years in use

Racing Boy 300 Kids' 20-Inch Mountain Bike 6-8 Years : We've designed this mountain bike for children aged 6 to 8 years (120 to 135cm) wanting to start mountain biking.

We've designed this robust, easy to use (1 speed) 20-inch children's MTB for discovering mountain biking.

Ease of use

This MTB is single-speed, with brake levers adapted to children's hands.

Lifetime warranty

B’Twin offers a lifetime warranty on the frame, stem, handlebar and rigid fork.

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Product Reviews

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884 reviews

Racing Boy 300 Kids' 20-Inch Mountain Bike 6-8 Years
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Fix the brake icons/symbols before someone gets hu

As per the previous reviewer, the bike is great, but the symbols depicting the front and rear brake are I correct. I had to swap around the cables to ensure that the symbols matched the actual brake that was being applied. Either take the symbols off or get them right.

Wee man's new bike .

Great bike for my wee man , the option to check the size was good because no kid will ever grow into a bike . Always buy the right size. There is enough adjustment room so it will last him a while . He's flying around in it , which is great .

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B Twin 20" bike

We bought 2 of these bikes for my twin grandsons 7th birthday. We commented on what a great idea it was that the bikes had "smiley" emojis on the brake handles pointing to the back & front brakes to show kids which bike was which. OH DEAR!!!! My grandsons went to the park with their Daddy to try out their new bikes. One of them pulled the "back brake" - the one with the backwards pointing emoji, only to go flying over the handlbars when the front brake came on! I took the bikes back to Decathlon to have them checked only to be told "the bikes come in from France and it is how they are made. Everyone knows the right brake is always the back brake and vice versa." Well guess what Decathlon, 7 year old kids don't!! This was the only flaw we could find, a great idea but wrong way round!! In all fairness the store gave me a voucher for future use, but my issue is the fact that my grandson could have been seriously injured had he been on the road. This needs sorting out Decathlon - remove the emojis from these bikes to prevent this occurring again to some other child. I will click the "YES" to reccomend this product as it is a lovely bike, but this problem does need addressing as a matter of urgency.

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Lovely bike good quality

Really good value for money my son loves it and has spent every day on it since his birthday

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Good quality bike.

I bought this product for my son's seventh Birthday on Saturday. I'm sure he'll love it. It's great quality and seems sturdy. Time will tell when he opens it on his birthday. Was packaged well and came a day early.

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Solid bike

THe bike was ourchased for my 7 yr old sons birthday. It arrived very quickly and setup was very quick as it was only the handlebars that needed pointing in the right direction and small back brake adjustment. It feels like quick a solid bike, brake grips are plastic but do have a nive easy adjustment built in which is good. The LED front/back lights were very low end, but wont be used anyway.

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Good Bike - Poor Setup

Bike is very good and my 6 year old boy loves riding this. However, I had bike delivered rather than collect in store and when it arrived it appears that if any setup/check has been completed then this was a very careless or sloppy check prior to delivery. Firstly the tyres were flat, easy enough to sort as I have a track pump, but more frustrating was the brake set up, there was no tension or stopping power when applying the breaks. Fortunately I have a bike stand and know my way round a bike and had to tension the breaks correctly myself, it worries me if I hadn't checked this first and corrected before letting my son on the bike, he wouldn't have been able to break or slow the bike down. Also, there is a small arrow pointing forward on the break lever which activates the rear break, and an arrow pointing backwards on the lever which activates the front break. I'm guessing these arrows are in place on each lever to help a child know which break is which ?, if so they might want to point the arrows on the correct direction on each lever. In all bike is great, just don't relay on it being set up correctly once it arrives, and check if the arrows on break levers are pointing in right direction, otherwise tell your child to ignore the arrows !

Great bike!

My son is six and this was bought for his birthday!! Customer service was perfect! Bike seems sturdy and well designed

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white B'TWIN bike

Lovely bike well made and looks great. son really likes it. Very good customer service too. Bike was made up and checked and asked me to come back in 3 months to get it checked again as wires stretch.

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Brilliant Bike

Bought for my 7 year old, he loves it and its very smart looking

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Fab bike for a novice rider

My son loves his new bike, after a wobbly start getting use to a larger size of bike his confidence has rocketed and he's managed a good few miles along the Tissington Trail. Fab quality and fab price.

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Satisfied Dad

Yet again excellent customer service, high quality bike, great value

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Happy customer

Bought this as collection from store, assembled properly for immediate use, good book overall and son is very happy to ride his new bike

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Perfect next step

This is the perfect bike for the next step up from a child's first bike! My son absolutely loves it!

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Racingboy 300 20" Single-Speed Bike -

A very good value bike, bought for my six year old son. Great learning bike that he enjoys riding to school, around the park, general use. My only negative feed back would be the weight of the bike, which can get heavy when carry it back from the park, and a dodgy bike wheel crank which looks and sounds quite cheaply put together - apart from that, great value first bike.

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Additional Product informations



  • 100% Steel

Why have we created a brake lever specifically for children?

Because children have smaller hands than adults, it's not always easy for them to reach the brake lever. This is why our engineers and designers have designeda brake lever closer to the handlebars that is easier to hold. The brakes are now in reach of little hands!

Controlled braking

Two V-Brake pads for effective braking.These brakes are composed of callipers that exert more or less pressure on the rim to slow or stop the rotation of the wheels.

Single speed

With only one speed, the bike is simple and remains effective on flat terrain.

Frame designed for mtb

This robust steel frame is designed to overcome obstacles on all your MTB outings.

A reinforced, ergonomic saddle

A saddle with a sporty design, designed with care to adapt to the morphology of children. It is equipped with a plastic section on the rear (a bumper) to protect against any impacts.

20" wheels and mtb tyres

The tyres are designed for mountain biking. The side lugs provide good grip when turning.The recommended pressure is indicated on the tyre sidewall.20-inch 1.7 to 2.2 cross-section inner tube with Schrader valve.

Mtb fittings

This MTB is equipped with a bell, lighting, wheel reflectors and platform pedals.The frame is also compatible with other B'Twin accessories:- front and rear mudguards- stand- rear pannier rack

Dimensions of the bike ready to use

Length: 140cm Height: 80cmWidth: 54cm

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Size Guide Visual