12" kids bikes are fully functional bikes, complete with pedals and brakes. They are usually equipped with training wheels that you can raise and eventually remove as your child learns to balance.
- 1 Measure the diameter of the existing tire, as illustrated above (D), or look on the tire for the size (it looks like this: nn" x n.n").
- 2 If you find the tire size, the first dimension is the tire diameter, the second dimension is the tire thickness.
- 3 Record the tire diameter, as this also represents the bike frame size.
- 4 Select your bike size from the drop-down on the right to see a rider chart.
Once you know your bike's frame size, select it from the drop-down to see how tall riders should be to use this bike.
Wheel Size (D) - This is the outer diameter of the wheel, with the tire installed on the rim.
Kids Bike Sizing (in) - Kids bikes are measured in inches.