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Kids' bike: what size for what age?

Balance bike, 14, 16, 20, 24 or 26 inch: the kids' bike size guide
29 September 2026 by
Kids' bike: what size for what age?
KOMUT

Reading time: 4 min · By the KOMUT Bikes team

A kids' bike in the right size means a child who learns faster, gains confidence and rides for longer. Here's our guide, from balance bike to teen bike.

In short

  • Size is measured by wheel diameter, in inches.
  • Age is a guide: inside leg length matters more.
  • A light bike means a more confident child.
  • Try in store with your child, free and with no appointment.

02

Why weight matters so much

½

A standard kids' bike can weigh almost half the child's body weight.

It's like an adult riding a 35 kg bike! A bike that's too heavy tires the child, slows learning and knocks confidence.

That's why we chose Woom : very light bikes, with brakes made for small hands and geometry designed for confidence.

03

Our tips for choosing well

1

Bring your child

A try-out in store checks size and comfort in a few minutes.

2

Don't size up too much

A bike that's too big is heavier and harder to control.

3

Think about the helmet

A well-fitted helmet is essential: discover our kids' helmets.

4

Think ahead

Woom bikes hold good resale value as your child grows.

All kids' bikes Kids' helmets Woom

FAQ

Frequently asked questions

There's no fixed age: once the child is at ease balancing on the balance bike, the move to a pedal bike usually happens very quickly, often without stabilisers.

No. A bike that's too big is heavier and harder to control, which slows learning and confidence. Better to get the right size today.

Age gives an indication, but your child's height and inside leg are what count. Come to the store with your child: we check the size in a few minutes.

Try with your child

Our team checks the size in a few minutes, free and with no appointment.

KOMUT Uccle
Rue Vanderkindere 438, 1180 Uccle

KOMUT Saint-Gilles
Chaussée de Charleroi 190, 1060 Saint-Gilles

KOMUT Stockel
Av. Baron Albert d'Huart 10, 1150 Woluwe-Saint-Pierre

Tuesday to Saturday, 10 am to 6 pm · Free test ride, no appointment