Sizing is based primarily on your child's inseam (inner-leg measurement), which is more reliable than age. When a rider falls between two sizes, the smaller wheel is easier to handle and the larger gives more room to grow.

Recommended inseam ranges differ by model, and we keep them current per bike, so use the Bike Chooser for an exact, up-to-date recommendation matched to your child's inseam.

See the Bike Chooser.