The right size – The be-all and end-all
A bike must fit the child's height and inseam. The size of a child's bike is measured in inches (""), which refers to the diameter of the wheels.
Guidelines:
| Old |
Height |
Wheel size |
| 2–3 years |
85–100 cm |
12 inches |
| 3–5 years |
95–110 cm |
14 inches |
| 4–6 years |
105–120 cm |
16 inches |
| 5–7 years |
115–130 cm |
18 inches |
| 6–9 years |
120–135 cm |
20 inches |
| 8–11 years |
130–145 cm |
24 inches |
👉 Tip: The child should be able to touch the ground with both feet when sitting on the saddle. This provides security, especially for beginners.
The weight – the lighter the better
Many children's bikes are simply too heavy. A good children's bike should weigh no more than 30% of the child's body weight. Lightweight bikes are easier to handle, push, and ride safely.
🚫 Stay away from heavy steel frames or unnecessary attachments – they make the bike unwieldy.
Frame geometry – child-friendly design
Children have different proportions than adults. A low step-through, a short distance between the saddle and handlebars, and an upright seating position make the bike safer and more comfortable to ride. A design that's too sporty can be overwhelming, especially for small children.
Brakes – child-friendly and reliable
Smaller bikes (up to about 16 inches) often have a coaster brake. This is convenient for beginners because it works intuitively. Rim brakes (V-brakes) become standard from about 20 inches. Make sure that:
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the brake levers are easily accessible,
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they can be easily operated with small hands,
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the braking effect is reliable.
👉 It is best to test on site whether the child can handle the brakes.
Safety equipment – no compromise
A roadworthy bicycle needs:
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Reflectors (front, rear, on the spokes and pedals)
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functioning lighting system (ideal: hub dynamo)
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Bell
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non-slip pedals
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well-profiled tires
A chain guard also protects against oil contamination and injuries.
Adjustability – grow with your child instead of buying new
A height-adjustable saddle and handlebars significantly extend the bike's lifespan. Some models can "grow" with the child over the years.
Test drive – absolutely!
Every child is different. That's why it's important to try out the bike before purchasing it. This is the only way to determine whether the child feels safe, can operate the brakes, and has good control of the bike.
Brand, quality & price – what really matters
When buying a children's bike, it's worth considering not only the price, but also the fit, weight, and safety. A good bike is not only fun, but also promotes motor development, self-confidence — and a lifelong love of cycling.
💡 Tip: High-quality children's bikes usually have a high resale value.
Extra tip for parents: A suitable helmet is always a must! And in the beginning, supervision is more important than speed.
