Shifting
Mechanical
10 of 367 bicycles with this information use electronic shifting.
Rockrider Kids' 20" 6-9 Years Mountain Bike Expl 900R
1 of 16
Rockrider Kids' 20" 6-9 Years Mountain Bike Expl 900R
1 of 16
- Rigid
- 20″
- 9.9
- Mechanical disc
Not published by the manufacturer
- Sizes and geometry
Components
Parts found in a manufacturer catalog show their brand, model and key numbers, and the steps show how precisely they are identified: brand, series, model, or the exact product. The info button has every detail and the text the manufacturer published.
Drivetrain
-
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.
Brakes
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Brakes
A bedding-in process is required. On a flat, dry road, perform 3 sets of 10 progressive brake applications at increasing speeds. 1) Ride at 15 km/h, brake down to 5 km/h, and repeat 10 times. 2) Ride at 20 km/h, brake down to 5 km/h, and repeat 10 times.3) Optional (kid's bike): Ride at 25 km/h, brake down to 5 km/h, and repeat 10 times.Between each step, release and ride for a few dozen metres in order to ventilate the disc.This bedding-in process optimises the pad/disc adhesion.
Wheels and tires
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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 20" lugged tyres with a 2.2 cross-section provide traction and lots of comfort. They help compensate for the lack of a suspension fork. The recommended tyre pressure is displayed on the tyre sidewall (between 2 and 3.5 bar). The 20" inner tube is compatible with cross-sections of 1.7 to 2.2. It has a Schrader valve.
Specifications
Frame and fork
- Intended fit
-
- Unisex
- Bicycle weight
-
- 9.9 kg
- 21.8 lb
Suspension
- Suspension configuration
-
- Rigid
Wheels and brakes
- Wheel configuration
-
- Same size
- Brake type
-
- Mechanical disc
Fit and controls
- Shifting
-
- Mechanical
Additional specifications
- Tire width
-
- 2.2″
- Wheel size
-
- 20″
Technical analysis
How these figures sit among bicycles of the same class and model year. Context, not a ranking.
Lineup changes
The published facts that differ across this family's builds and from the same model a year earlier. Missing information never counts as zero.
Differences across 2025 builds
Other models in this family
Published versions from the same family and model year.
Kids' 20" 6-9 Years Mountain Bike Expl 900R
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