Four available sizes of this kids bike use 12-in, 14-in, 16-in, or 18-in wheels so you can match the frame to your child’s height, from about 31.5-41.3-in riders on the 34.5 x 19.5 x 25.5 in 12-in bike up to about 47.2-59.1-in riders on the 49.5 x 21.5 x 32.5 in 18-in bike, all with a 145-lb seat capacity. An adjustable handlebar and saddle help kids reach the pedals comfortably as they grow. Detachable training wheels add stability while they learn, and both a hand brake and coaster brake provide controlled stops.