Decathlon Btwin ST120, Kids Mountain Bike, 20″, 6 Speed, 3’11” to 4’5″, White
Is your child ready to go down the trails and is looking for a great Mountain Bike. Our team of engineers has designed our Decathlon Btwin ST120, Kids Mountain Bike, 20″, 6 Speed, 3’11” to 4’5″, White. We made this Mountain Bike for your Child’s comfortability while having quick and responsive brakes. Due to kids having smaller hands than adults, it’s not always easy for them to reach the brake lever.
Is your child ready to go down the trails and is looking for a great Mountain Bike. Our team of engineers has designed our Decathlon Btwin ST120, Kids Mountain Bike, 20″, 6 Speed, 3’11” to 4’5″, White. We made this Mountain Bike for your Child’s comfortability while having quick and responsive brakes. Due to kids having smaller hands than adults, it’s not always easy for them to reach the brake lever. This is why our engineers designed a brake lever that is closer to the handlebars and thus easier to hold. With Two V-brake pads for effective braking, it quickly stops the rotations of the wheels. The frame’s rear chainstay is short, making the bike responsive and easy to handle. To take on the first slopes, our engineers have equipped this kids’ MTB with 6 speeds. This bike allows your child to take on sloping terrain. Our Mountain Bike is equipped with a bell, lighting, wheel reflectors, and platform pedals.
Decathlon Btwin ST120, Kids Mountain Bike, 20″, 6 Speed, 3’11” to 4’5″, White
Easy to use
- Equipped with a grip shifter to easily change gears (6 speeds).
- The bike is equipped with a grip shifter to change between the 6 speeds: an easier, safer system as the kid’s hands stay on the handlebars. This makes changing gears to match the terrain simple and easy!
Frame
- Our engineers have designed a new sturdy steel frame. T
- The frame’s rear chainstay is short so the bike is responsive and easy to handle.
- The chain wheel anti-derailment device and low step-through frame make it easy to get on and off.
Controlled Braking
- Two V-brake pads for effective braking. These brakes are composed of calipers that exert more or less pressure on the rim to slow down or stop the rotation of the wheels.
Riding Position
- When mountain biking, it’s 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 need for adjustments so they can keep their eyes on the trail!
- A saddle with a sporty design, designed with care to adapt to the morphology of kids. It is equipped with a plastic section on the rear (a bumper) to protect against any impacts.
- Since kids have smaller hands than adults, it’s not always easy for them to reach the brake lever. This is why our engineers designed a brake lever that is closer to the handlebars and thus easier to hold.
20″ Wheels And MTB Tires
- The tires are designed for mountain biking. The side knobs provide a good grip on corners.
- The recommended tire pressure is indicated on the side of the tire (2 to 3.5 bars). 20″ inner tube and 1.7″ to 2.2″ Schrader valve.
Additional information
| Features | Seat comfort, Brake control |
|---|---|
| Gender | Unisex |
| Manufacturer Part Number | 8557142 |





by Nita
Very nicely designed for kids. My 7year kid is enjoying. Just the concerning point is we didn’t received the stand for the bike..not sure they forgot to provide. I don’t find details any where for the same.
by Rabie
This is a great bike. I know decathlon for years . I highly recommend.
by Ben
My 6 year old can handle this bike with ease and shifting gears and breaks are made for his hands