6’4″ to 6’6″ with 35″ and up inseam xxl 23 inch or bigger children’s bikes, as the chart shows, are sized according to the wheel size of the bike and the age of the child. inseam length (cm) × 0.685 = hybrid bike size (cm) inseam length (cm) × 0.225 = mtb bike size (inches) inseam length (cm) × 0.665 = road bike size (cm) 1 in. 22” (56 cm) * note:
Bicycle Guide
While adult bicycles are sized according to the frame size, kids’ bikes depend on the wheel size. Now you know the size you need will depend on your height,. top tube is the top part of the frame that connects the head tube (front of the bike) with the seat tube. The frame size is the measurement from where you sit to the top tube and the wheel size is measured in.
