Product Colors and Sizes
20 Inch Kids Mountain bike Rockrider ST 500 6-9 Years old
Product Features

Ease of use
Equipped with a grip shifter to easily change gears (6 speeds).
Brake control
New Easy break brake levers are sized for children's small hands.
Efficiency
Suspension fork. Skinwall tyres for less weight, with side knobs.
Cycling comfort
A saddle with a sporty design, sized especially for kids.
Product Lifestyle Image gallery
Image gallery
![[[contextphoto]]](
//cdn.shopify.com/s/files/1/0529/5269/4973/products/bb22b0e8988d017c96ae3b2e26f54c2f_160x.progressive.jpg?v=1651474150 160w,
//cdn.shopify.com/s/files/1/0529/5269/4973/products/bb22b0e8988d017c96ae3b2e26f54c2f_285x.progressive.jpg?v=1651474150 285w,
//cdn.shopify.com/s/files/1/0529/5269/4973/products/bb22b0e8988d017c96ae3b2e26f54c2f_320x.progressive.jpg?v=1651474150 320w,
//cdn.shopify.com/s/files/1/0529/5269/4973/products/bb22b0e8988d017c96ae3b2e26f54c2f_380x.progressive.jpg?v=1651474150 380w,
//cdn.shopify.com/s/files/1/0529/5269/4973/products/bb22b0e8988d017c96ae3b2e26f54c2f_450x.progressive.jpg?v=1651474150 450w,
//cdn.shopify.com/s/files/1/0529/5269/4973/products/bb22b0e8988d017c96ae3b2e26f54c2f_525x.progressive.jpg?v=1651474150 525w,
//cdn.shopify.com/s/files/1/0529/5269/4973/products/bb22b0e8988d017c96ae3b2e26f54c2f_590x.progressive.jpg?v=1651474150 590w,
//cdn.shopify.com/s/files/1/0529/5269/4973/products/bb22b0e8988d017c96ae3b2e26f54c2f_650x.progressive.jpg?v=1651474150 650w,
//cdn.shopify.com/s/files/1/0529/5269/4973/products/bb22b0e8988d017c96ae3b2e26f54c2f_760x.progressive.jpg?v=1651474150 760w,
//cdn.shopify.com/s/files/1/0529/5269/4973/products/bb22b0e8988d017c96ae3b2e26f54c2f_900x.progressive.jpg?v=1651474150 900w,
//cdn.shopify.com/s/files/1/0529/5269/4973/products/bb22b0e8988d017c96ae3b2e26f54c2f_1000x.progressive.jpg?v=1651474150 1000w,
)
![[[contextphoto]]](
//cdn.shopify.com/s/files/1/0529/5269/4973/products/99bf9a45a3ba3540062173767c276995_160x.progressive.jpg?v=1651474154 160w,
//cdn.shopify.com/s/files/1/0529/5269/4973/products/99bf9a45a3ba3540062173767c276995_285x.progressive.jpg?v=1651474154 285w,
//cdn.shopify.com/s/files/1/0529/5269/4973/products/99bf9a45a3ba3540062173767c276995_320x.progressive.jpg?v=1651474154 320w,
//cdn.shopify.com/s/files/1/0529/5269/4973/products/99bf9a45a3ba3540062173767c276995_380x.progressive.jpg?v=1651474154 380w,
//cdn.shopify.com/s/files/1/0529/5269/4973/products/99bf9a45a3ba3540062173767c276995_450x.progressive.jpg?v=1651474154 450w,
//cdn.shopify.com/s/files/1/0529/5269/4973/products/99bf9a45a3ba3540062173767c276995_525x.progressive.jpg?v=1651474154 525w,
//cdn.shopify.com/s/files/1/0529/5269/4973/products/99bf9a45a3ba3540062173767c276995_590x.progressive.jpg?v=1651474154 590w,
//cdn.shopify.com/s/files/1/0529/5269/4973/products/99bf9a45a3ba3540062173767c276995_650x.progressive.jpg?v=1651474154 650w,
//cdn.shopify.com/s/files/1/0529/5269/4973/products/99bf9a45a3ba3540062173767c276995_760x.progressive.jpg?v=1651474154 760w,
//cdn.shopify.com/s/files/1/0529/5269/4973/products/99bf9a45a3ba3540062173767c276995_900x.progressive.jpg?v=1651474154 900w,
//cdn.shopify.com/s/files/1/0529/5269/4973/products/99bf9a45a3ba3540062173767c276995_1000x.progressive.jpg?v=1651474154 1000w,
)
![[[contextphoto]]](
//cdn.shopify.com/s/files/1/0529/5269/4973/products/c1eb9c61ed4fc8ba8af6855f76fd9bbf_160x.progressive.jpg?v=1651474158 160w,
//cdn.shopify.com/s/files/1/0529/5269/4973/products/c1eb9c61ed4fc8ba8af6855f76fd9bbf_285x.progressive.jpg?v=1651474158 285w,
//cdn.shopify.com/s/files/1/0529/5269/4973/products/c1eb9c61ed4fc8ba8af6855f76fd9bbf_320x.progressive.jpg?v=1651474158 320w,
//cdn.shopify.com/s/files/1/0529/5269/4973/products/c1eb9c61ed4fc8ba8af6855f76fd9bbf_380x.progressive.jpg?v=1651474158 380w,
//cdn.shopify.com/s/files/1/0529/5269/4973/products/c1eb9c61ed4fc8ba8af6855f76fd9bbf_450x.progressive.jpg?v=1651474158 450w,
//cdn.shopify.com/s/files/1/0529/5269/4973/products/c1eb9c61ed4fc8ba8af6855f76fd9bbf_525x.progressive.jpg?v=1651474158 525w,
//cdn.shopify.com/s/files/1/0529/5269/4973/products/c1eb9c61ed4fc8ba8af6855f76fd9bbf_590x.progressive.jpg?v=1651474158 590w,
//cdn.shopify.com/s/files/1/0529/5269/4973/products/c1eb9c61ed4fc8ba8af6855f76fd9bbf_650x.progressive.jpg?v=1651474158 650w,
//cdn.shopify.com/s/files/1/0529/5269/4973/products/c1eb9c61ed4fc8ba8af6855f76fd9bbf_760x.progressive.jpg?v=1651474158 760w,
//cdn.shopify.com/s/files/1/0529/5269/4973/products/c1eb9c61ed4fc8ba8af6855f76fd9bbf_900x.progressive.jpg?v=1651474158 900w,
//cdn.shopify.com/s/files/1/0529/5269/4973/products/c1eb9c61ed4fc8ba8af6855f76fd9bbf_1000x.progressive.jpg?v=1651474158 1000w,
)
![[[contextphoto]]](
//cdn.shopify.com/s/files/1/0529/5269/4973/products/cd2789cd09dca3429bbb1f8fbaa68183_160x.progressive.jpg?v=1651474161 160w,
//cdn.shopify.com/s/files/1/0529/5269/4973/products/cd2789cd09dca3429bbb1f8fbaa68183_285x.progressive.jpg?v=1651474161 285w,
//cdn.shopify.com/s/files/1/0529/5269/4973/products/cd2789cd09dca3429bbb1f8fbaa68183_320x.progressive.jpg?v=1651474161 320w,
//cdn.shopify.com/s/files/1/0529/5269/4973/products/cd2789cd09dca3429bbb1f8fbaa68183_380x.progressive.jpg?v=1651474161 380w,
//cdn.shopify.com/s/files/1/0529/5269/4973/products/cd2789cd09dca3429bbb1f8fbaa68183_450x.progressive.jpg?v=1651474161 450w,
//cdn.shopify.com/s/files/1/0529/5269/4973/products/cd2789cd09dca3429bbb1f8fbaa68183_525x.progressive.jpg?v=1651474161 525w,
//cdn.shopify.com/s/files/1/0529/5269/4973/products/cd2789cd09dca3429bbb1f8fbaa68183_590x.progressive.jpg?v=1651474161 590w,
//cdn.shopify.com/s/files/1/0529/5269/4973/products/cd2789cd09dca3429bbb1f8fbaa68183_650x.progressive.jpg?v=1651474161 650w,
//cdn.shopify.com/s/files/1/0529/5269/4973/products/cd2789cd09dca3429bbb1f8fbaa68183_760x.progressive.jpg?v=1651474161 760w,
//cdn.shopify.com/s/files/1/0529/5269/4973/products/cd2789cd09dca3429bbb1f8fbaa68183_900x.progressive.jpg?v=1651474161 900w,
//cdn.shopify.com/s/files/1/0529/5269/4973/products/cd2789cd09dca3429bbb1f8fbaa68183_1000x.progressive.jpg?v=1651474161 1000w,
)
![[[contextphoto]]](
//cdn.shopify.com/s/files/1/0529/5269/4973/products/ec71bb0790c56f4c9dbddcda3f27c0b2_160x.progressive.jpg?v=1651474165 160w,
//cdn.shopify.com/s/files/1/0529/5269/4973/products/ec71bb0790c56f4c9dbddcda3f27c0b2_285x.progressive.jpg?v=1651474165 285w,
//cdn.shopify.com/s/files/1/0529/5269/4973/products/ec71bb0790c56f4c9dbddcda3f27c0b2_320x.progressive.jpg?v=1651474165 320w,
//cdn.shopify.com/s/files/1/0529/5269/4973/products/ec71bb0790c56f4c9dbddcda3f27c0b2_380x.progressive.jpg?v=1651474165 380w,
//cdn.shopify.com/s/files/1/0529/5269/4973/products/ec71bb0790c56f4c9dbddcda3f27c0b2_450x.progressive.jpg?v=1651474165 450w,
//cdn.shopify.com/s/files/1/0529/5269/4973/products/ec71bb0790c56f4c9dbddcda3f27c0b2_525x.progressive.jpg?v=1651474165 525w,
//cdn.shopify.com/s/files/1/0529/5269/4973/products/ec71bb0790c56f4c9dbddcda3f27c0b2_590x.progressive.jpg?v=1651474165 590w,
//cdn.shopify.com/s/files/1/0529/5269/4973/products/ec71bb0790c56f4c9dbddcda3f27c0b2_650x.progressive.jpg?v=1651474165 650w,
//cdn.shopify.com/s/files/1/0529/5269/4973/products/ec71bb0790c56f4c9dbddcda3f27c0b2_760x.progressive.jpg?v=1651474165 760w,
//cdn.shopify.com/s/files/1/0529/5269/4973/products/ec71bb0790c56f4c9dbddcda3f27c0b2_900x.progressive.jpg?v=1651474165 900w,
//cdn.shopify.com/s/files/1/0529/5269/4973/products/ec71bb0790c56f4c9dbddcda3f27c0b2_1000x.progressive.jpg?v=1651474165 1000w,
)
Product Reviews
There are no reviews yet for this product
Additional Product informations
Composition
Frame
- 100% Steel
Frame designed 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 gear
This bike is equipped with a grip shifter to change between the 6 speeds: an easier, safer system as the child's hands stay on the handlebars.This makes changing gears to match the terrain simple and easy!
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.
Crankset
The new chainset has a 140 mm crank that is designed for a child's leg length. This chainset allows you to start pedalling more easily. The crank is covered to prevent the child from coming into contact with the metal part.The double chain guard prevents the chain from derailing.
Riding position
When mountain biking, it is important to control your path. To make it easier for children to learn, our engineers installed a handlebar and stem that are combined into a single steering block. This eliminates the needs for adjustments, so they can stay focused on the road!
20" wheels and mtb skinwall tyres
The tyres are designed for mountain biking. The lateral lugs provide good grip on turns. 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 indicated on the side of the tyre (2 to 3.5 bars). 20" inner tube, 1.7" to 2.2" 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: https://www.decathlon.co.uk/20-and-24-stabilisers-id_8550741.html
Dimensions of the bike ready to use
Length: 140cm.Height: 80cm.Width: 54cm.
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: 431.6 mmSeat tube length: 285 mmChainstay length: 360 mmSeat post length: 300 mmHead angle: 68.8°
Photos non binding
For the drive train parts (freewheel and derailleur), the photos or 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 a different brand may be present on the bike.
Product Recently viewed

20 Inch Kids Mountain bike Rockrider ST 500 6-9 Years old
Your location: City, ST
Please enter a valid city with state or zipcode. Example: San Francisco, CA or 94101
Order online for
Heavy products return policy
If you return a product you will receive a refund for the purchase price plus any applicable sales taxes, less any non-refundable charges.
Decathlon will cover all shipping costs associated with your return except for items excluded from our return policy such as bikes, basketball hoops, snowboards, surfboards, tents, and other larger / heavier items.
Return costs for heavy products:
Weight Thresholds | Shipping within California | Shipping outside of California |
---|---|---|
> 9 lbs | $20.00 | $25.00 |
> 30 lbs | $50.00 | $65.00 |
> 100 lbs | $100.00 | $125.00 |
> 200 lbs | $200.00 | $230.00 |
If you return a product at any of our store locations, we will gladly help you find the best alternative product or refund you on the spot.
