20” RR ST 500 Black 2024

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Ref. : 8788659

6-9 years old children (120cm-135cm)

20"alu frame bike with 6 speeds, front suspension

Color: smoked black

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Our services :

  • Free delivery for Decathlon brands orders above $399
  • All Decathlon products are eligible for lifetime return

Products benefits

Ease of use

Alu frame more lightness for kids learning.6s easy trigger easy to chage speed.

Brake control

New Easy break brake levers are sized for children's small hands.


Suspension fork. Tyres with side knobs.


20” RR ST 500 Black 2024
20” RR ST 500 Black 2024
20” RR ST 500 Black 2024
20” RR ST 500 Black 2024
20” RR ST 500 Black 2024
20” RR ST 500 Black 2024
20” RR ST 500 Black 2024

Technical information


Aluminium frame designed by B'Twin. It is more lightness because for the beginner lightness is more easier to control the bike.The lowered frame geometry makes it easier to get on and off the bike.


6 speeds. Easy trigger for children: change gears using the trigger, which is easier and safer .

Handlebar / stem / steering

Mid-rise stem and handlebar.
Quick-release saddle. Comfortable, reinforced (plastic shell) saddle that provides a comfortable position. Fast, tool-free saddle adjustment. B'Twin selected this reinforced saddle for its tried-and-tested durability (should the bike fall over, for instance).


Very reliable double brake Brakes. 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 cover at the back (a bumper) to protect from any impacts.


The chainset has a 140 mm crank 36t 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.

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 20*1.95 are designed for mountain biking. The side lugs provide good traction for cornering.
The recommended tyre pressure is indicated on the side of the tyre (2 to 3.5 bars). 20" inner tube, 1.85" to 2.2" Schrader valve.


Lifetime warranty :frame, stem, handlebars

Product concept & technology

Product Composition

Bike frame 100% Aluminium

User Restrictions

Wear a cycling helmet.

User reviews

Questions & Answers