Avoid the temptation to "buy big" for them to grow into. A bike that’s too large is difficult to maneuver and can discourage a new rider from ever wanting to get back in the saddle.
Usually 12" to 16" wheels. Look for single-speed models to keep things simple. how to buy a bike for a child
Your child should be able to stand over the top bar with both feet flat on the ground. There should be 1–3 inches of clearance between their crotch and the frame. Avoid the temptation to "buy big" for them to grow into
A heavy steel bike can weigh half as much as the child, making it hard to control. Aim for a lightweight aluminum frame if your budget allows. Look for single-speed models to keep things simple
For beginners, the saddle height should allow their feet to be flat on the ground. For confident riders, they can be on their tiptoes while seated. 2. Sizing Cheat Sheet Use this general wheel size guide based on height: Wheel Size Height Range Typical Age 12-inch 2'10" – 3'4" 2–4 years 16-inch 3'3" – 3'10" 4–6 years 20-inch 3'9" – 4'5" 6–9 years 24-inch 4'5" – 4'11" 8–12 years 3. Choose the Right Type
If you'd like, I can help you if you tell me: Your child's height or inseam Their experience level (first-timer or ready for gears?) Your budget () How to choose the right size bike for a child | Cycling UK
These start adding gears and hand brakes, mimicking adult mountain or road bikes. 4. Critical Quality & Safety Checks