Calculate your kid's bike size
For kids' and youth bikes, wheel size in inches is what counts. A bike that fits builds confidence and is fun, one that's too big tends to unsettle. Set your child's height.
- What counts: Height & inside leg length
- Given as: Wheel size 12" to 26"
Kids bike calculator
Sitting on the saddle, your child should reach the ground with the balls of both feet and hold the handlebars without stretching.
- Suitable wheel sizes
- 16", 18", 20"
- Age (guide)
- 6–8 years
Guide values based on the BIDEX size chart. Children grow at different rates, so height tells you more than age.
Kids bike size chart: 12 to 26 inch by height
| Height | Recommended | Wheel sizes | Age (guide) | Listings |
|---|---|---|---|---|
| under 100 cm | 12" | 12" | approx. 2–4 years | View bikes |
| 100–120 cm | 16" | 12", 14", 16" | approx. 4–6 years | View bikes |
| 120–130 cmFits | 20" | 16", 18", 20" | approx. 6–8 years | View bikes |
| 130–140 cm | 20" | 18", 20" | approx. 8–10 years | View bikes |
| 140–150 cm | 24" | 20", 22", 24" | approx. 10–12 years | View bikes |
| from 150 cm | XS/S | 26", 27.5" | from approx. 12 years | View bikes |
What matters with a kids bike
Don't buy one to grow into
A bike that's too big is hard to control and spoils the fun. Buy the right size instead. Kids' bikes are easy to resell second-hand.
Sell your old kids bikeLighter is better
Children need to be able to move and hold their bike themselves. A light bike makes learning to ride much easier.
Adjust as they grow
Saddle and handlebars are adjustable. If you check the setup every season, a bike often fits for one to two years.
Frequently asked questions
The right bike for your child
New and used kids' and youth bikes, bought safely on TCS velocorner.ch.
Prefer to pay in instalments? Buy a bike in instalments, at 0% interest on selected offers.