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Rockrider ST 500 Kids' 24-Inch Mountain Bike 9-12 Years - Neon

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Sale price: Dhs. 1,150.00 Regular price:
Model: 8405041

Product Features

A photo of the Rockrider ST 500 Kids' 24-Inch Mountain Bike 9-12 Years - Neon in use

Rockrider ST 500 Kids' 24-Inch Mountain Bike 9-12 Years - Neon : We have designed this mountain bike for 9- to 12-year-olds (135 to 150 cm) who want to regularly go mountain biking.

To ensure riders can easily overcome rough terrain, we've equipped this 24-inch MTB with a suspension fork. Easily overcome hilly paths with the 18 speeds.

Ease of use

With two grip shifters to easily change between the 18 speeds.

Brake control

Two V-Brake pads for effective braking.


Suspension fork. Skinwall tyres for less weight, with side knobs.

Cycling comfort

A saddle with a sporty design, sized especially for kids.

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Product Reviews

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3242 reviews

Rockrider ST 500 Kids' 24-Inch Mountain Bike 9-12 Years - Neon
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Make sure the bicycle is assembled properly!

I just picked up my son's new bicycle yesterday morning from your store. Yesterday afternoon while my son was riding the bicycle in the local park I noticed that my son's feet was coming off from the pedals very often. Today I decided to accompany my son, riding the bicycle in the local park as well. I was standing looking at my son when he suddenly stopped because the left pedal just fell down on the ground. He was riding the new bicycle on the tar surface inside the park. My son was very lucky that he didn't injure himself. He could easily have lost his balance. This is unacceptable. I tried to attach the pedal inside the park, but I couldn't do it. There was a loose piece of metal tread inside the area that was supposed to be attached to each other. I managed to fix it properly at home with my adjustable spanner.

Hello Fernando,

We are sorry about the negative experience you had in our store.

We value the customer experience and customer service as the most important part of our business.

We appreciate your valuable feedback and we will report it to the team in order to improve.

Kind Regards.

Bike for my sons birthday

Top quality bike...

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The salesman is very attentive and professional.

The bicycle department salesman of Milton Keynes is very careful to understand about our needs. Although the shop does not have the actual goods of this bike, we still believe that this gentleman’s recommendation and purchase of this bicycle are very suitable for us.

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Fantastic value for money

Used the click and collect service for the Southampton branch, the bike was built and ready to collect within 3 hours. Great service and my little boy love the bike

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It is the first bicycle that I bought for my daughter and I recommend it to her.

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Best birthday present

Easy to put together and ride away. Package was well protected.

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Great bike but cable ties scratched the frame.

Really happy with bike, it has really good build quality. My only whinge is the cable ties were so tight on the frame they scratched the stickers. Slightly annoying tbh.

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Dangerous product

I bought this a few years ago and today my son had a dangerous fall as a result of the seat suddenly collapsing despite regular checks and tightening.

Excellent !! service and great bike

My daughter loves her bike. Really well made and excellent product I would like to commend Decathlon on customers service. Great advice buying the bike and the service to get the bike to me before the shops shut due to the Coronavirus was outstanding. I don’t normally write reviews, but had to this time Thanks folks !!

Rock rider

Excellent service Instore. Free home delivery. Excellent quality bike.

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Just what we wanted

An excellent bike, delivered on time I damaged with minimal assembly required.

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Epic bike

It has good steering.It's got good brakes

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Quality bike. Have two of them.

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Благодарим Ви за отделеното време и оценката, която сте дали за нашия продукт. Качественото обслужване, доволните клиенти и предоставянето на възможността всички да спортуват е наша главна цел.

Пожелаваме Ви много приятни спортни преживявания!

Спортни поздрави,

Екипът на Декатлон България!



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Благодарим Ви, че отделихте от времето си, за да ни оставите Вашата обратна връзка. Нашият екип следи всички канали, за да можем да подобряваме услугите си всеки ден.

Спортни поздрави,

Екипът на Декатлон България!


Качество, бързина, коректост

icon-circle-checkmark Verified purchase


Благодарим Ви за отделеното време и оценката, която сте дали за нашия продукт. Качественото обслужване, доволните клиенти и предоставянето на възможността всички да спортуват е наша главна цел.

Спортни поздрави,

Декатлон България

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Additional Product informations



  • 100% Steel

A frame that is suitable for mountain biking

Our engineers have designed a new, robust steel frame. The frame's rear chainstays are short, making the bike responsive and easy to handle.

Front suspension to cushion unpredictable terrain

Take on new challenging terrain (roots, stones, gravel, etc.) with ease thanks to the travel of the front suspension fork.

Changing between the 18 speeds

This bike is equipped with 2 grip shifters to make it easy to change between the 18 speeds.Left (chainrings): control ascents/descents.Right (speeds): more precise control over your pedalling.

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.

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.

Riding position

To provide you with maximum comfort, this mountain bike is equipped with a high-rise stem. Your position on the bike is slightly raised so you can better anticipate your trajectory.


The new chainset has a 152 mm crank that is adapted to the length of your child's leg. This chainset allows you to start pedalling more easily. The crank is covered with a guard to stop you coming into contact with the metal part.

24" wheels and skinwall mtb tyres

To transport the bike, we’ve made it easy to remove and attach the front wheel. It is equipped with a quick-release system.The tyres use SkinWall technology. This process reduces their weight and makes them more flexible, which increases performance, grip and comfort.The recommended tyre pressure is displayed on the tyre sidewall (between 2 and 3.5 bar).24-inch 1.7 to 2.2 cross-section inner tube with Schrader valve.

Bike accessories

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- bottle cage- saddle bag- stabilisers:

Dimensions of the bike ready to use

Length: 160cm.Height: 100cm.Width: 56 cm.

What if i order online?

For smoother shipping, our bikes come with their pedals removed and the handlebar unscrewed (instructions and tools are supplied)

Frame dimensions

Top tube length: 478.6 mmSeat tube length: 345 mmChainstay length: 415 mmSeat post length: 300 mmHead angle: 68.2°

Photos non binding

For the drive train parts, and particularly the freewheel and derailleur, the photos and videos provided on the product description show a Shimano derailleur and a Spark freewheel. However, because of procurement issues, an equivalent derailleur and cassette from different brand may be present on the bike.

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Size Guide Visual