Choosing the right kids bike size or understanding kids bike sizes is one of the most important steps in helping young riders build confidence and enjoy cycling. Our range includes everything from balance bikes for toddlers to junior bikes with larger wheels for older riders and longer adventures.
Kids bikes are usually organised by wheel size, which provides a helpful starting point when choosing the right bike. Age ranges can give a rough guide, but every child grows differently, so we recommend using our Kids Bike Size Guide to check height and inside-leg measurements for the best fit.
Kids bike sizes explained
Typical age ranges for common wheel sizes are:
- 12 inch bikes – typically suited to riders aged 2–4 years
- 14 inch bikes – typically suited to riders aged 3–5 years
- 16 inch bikes – typically suited to riders aged 4–6 years
- 18 inch bikes – typically suited to riders aged 5–7 years
- 20 inch bikes – typically suited to riders aged 6–8 years
- 24 inch bikes – typically suited to riders aged 8–11 years
- 26 inch bikes – typically suited to riders aged 10+ years
Some of the most popular starting points are 12" kids bikes for first pedal riders, 16" kids bikes for confident young riders, and 20" kids bikes for longer rides with gears.
For toddlers and early riders, balance bikes are often the best place to start, helping children learn balance and steering before moving to pedals.
As riders grow and gain confidence, many progress to specialised bikes designed for different riding styles, including kids’ mountain bikes for trails and off-road riding, or larger junior bikes with 26″ or 27.5″ wheels that feel closer to adult bikes.
What to look for when choosing a kids’ bike
- Correct size – the right fit makes riding safer and far more enjoyable. Wheel size is the starting point, but height and inside-leg measurements help confirm the best option.
- Weight and handling – lighter bikes are easier for children to control, start and stop, helping build confidence faster.
- Brakes and components – child-specific brake levers, stable geometry and reliable tyres make riding safer and more comfortable.
If you're unsure which size or style is best, our detailed Kids Bike Buying Guide explains everything from sizing and riding styles to key features to look for.
We also stock kids bikes from leading brands including Frog kids bikes, Squish kids bikes, Cube kids bikes, Trek kids bikes, Specialized kids bikes, Scott kids bikes, Whyte kids bikes, Marin kids bikes, Merida kids bikes, Kona kids bikes, Ridgeback kids bikes, Giant kids bikes, Liv kids bikes, DMR kids bikes, Hoy kids bikes and Kids Ride Shotgun bikes.