Bike Size Guide for Young Kids (Ages 5–8) | Kids Bike Sizing

Children ages 5–8 are in a critical transition period — moving from balance or training-wheel bikes to independent pedal riding. Bike size is still determined primarily by wheel diameter (16", 18", or 20"), but at this stage proper saddle height and standover clearance become even more important as kids ride faster and take on more challenging terrain. Most children in this age range are ready for hand brakes, and many 7–8 year olds can handle basic gear shifting. The key fitting principle remains the same: at the lowest saddle position, your child should be able to touch the ground with the balls of their feet (not necessarily flat-footed like younger riders). This slightly higher position allows more efficient pedaling while still providing confidence. Bike weight continues to matter — aim for the lightest bike you can afford, as a heavy bike discourages riding and makes learning harder.