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Rockrider ST500, Mountain Bike, 24", Kids 4'5" to 4'11"

Sale price: $349.00 Regular price:

To ensure riders can easily overcome rough terrain, we've equipped this 24-inch MTB with a suspension fork. Easily tackle hilly paths with the 6 speeds

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Sale price: $349.00 Regular price:

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San Francisco, 735 Market St. Options

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About this item:

  • Shifter: 6-speed grip shifter.
  • Equipped with suspension fork to cushion unpredictable terrain.
  • Brakes: Ultra-reliable v-brake system that's easy to use and maintain.
  • Lifetime Warranty: Frame, stem, handlebars, and rigid fork guaranteed for life.
Model: 8629908

Product Features

A photo of the Rockrider ST500, Mountain Bike, 24", Kids 4'5" to 4'11" in use

Rockrider ST500, Mountain Bike, 24", Kids 4'5" to 4'11" | We have designed this mountain bike for 9-to-12-year-olds (4'5" to 4'11") wanting 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 tackle hilly paths with the 6 speeds

Easy to use

With grip shifter to easily change between the 6 speeds.

Brake control

2 V-Brake pads for effective braking.


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

Cycling comfort

A saddle with a sporty design and a shape adapted to kids' bodies

Product Lifestyle Image Gallery

Image Gallery

Rockrider ST500, Mountain Bike, 24 

Rockrider ST500, Mountain Bike, 24 

Rockrider ST500, Mountain Bike, 24 

Rockrider ST500, Mountain Bike, 24 

Rockrider ST500, Mountain Bike, 24 

Rockrider ST500, Mountain Bike, 24 

Rockrider ST500, Mountain Bike, 24 

Rockrider ST500, Mountain Bike, 24 

Rockrider ST500, Mountain Bike, 24 

Rockrider ST500, Mountain Bike, 24 

Rockrider ST500, Mountain Bike, 24

Product Customer Reviews

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Rockrider ST500, Mountain Bike, 24
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Rokcrider st500 bike

العجلة حلوة جدا النور بتعهه جامد اوي الكوتشه مبتهويش بسرعة ألونهه حلوة جدا أنا مشفتش عجلة ألوانها كده خالص

Terrible product

We purchased this bike in November 2020 as our son's 2020 Xmas 2020 gift. After 1 year of occasional use we have discovered that the chain is loose and jumps off the cogs during gear changes. My son has fallen whilst this has happened. Given this problem of the chain jumping we fail to see how this product could be used safely as a mountain bike on trails/ rough terrain. The most recent accident due to the chain jumping led to the front wheel being bent and the brakes damaged. Given it has been more than 1 year since purchase we took it to a local repair shop.. His verdict: that's what you get for a bike of that price!

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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Мисията на Декатлон ще остане непроменена - да правим спорта достъпен за възможно най-много хора, по един отговорен към природата начин.

Благодарим Ви, че оценихте нашия продукт!

Спортни поздрави,

Екипът на Декатлон България

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Size Guide

Size Guide Visual

Additional Product Information


Bike frame

  • 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 to make the bike dynamic 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 6speeds

This bike is equipped with grip shifter to make it easy to change between the 6 speeds - more precise control over your pedaling.

Controlled braking

2 V-Brake pads for effective braking. These brakes are composed of calipers 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 kids. It is equipped with a plastic cover at the back (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 kids' legs. This chainset allows you to start pedaling more easily. The crank is covered with a guard to stop you from coming into contact with the metal part. The double guard over the chain stops it from jumping.

24" wheels and skinwall mtb tires

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 tires use SkinWall technology. This process reduces their weight and makes them more flexible, which increases performance, grip, and comfort. The recommended tire pressure is displayed on the tire sidewall (between 2 and 3.5 bar). 24-inch 1.7 to 2.2 cross-section inner tube with Schrader valve.

Compatible accessories

KIDS BIKE STAND 100 (Model Code 2694189) 20" & 24" KIDS BIKE STABILIZERS (Model Code 8550741)

Warranty information

"Lifetime warranty on manufacturing defects for all metal frames, rigid forks, stems, and handlebars 5 years warranty on all carbon frames and forks 2 years warranty on all other parts Excludes damages arising from normal wear and tear, misuse, negligence, and unauthorized modifications"



Storage instructions

Store the bike in a clean, dry place. Clean and grease the chain regularly. Our tips for before each ride: inflate the tires to the pressure indicated on the sidewall.


for life (frame, stem, handlebars, rigid fork). Find out more about the bike guarantee.