What size bike does a 14 year old boy need?

The size of a bike for a 14-year-old boy will depend on the individual's height and inseam. To find the right frame size, you can use the following formula:

Frame Size = Inseam x 0.65

_To measure inseam, the boy should stand barefoot with their feet shoulder-width apart. Then, measure from the top of the inside of their leg (at the crotch) down to the ground. The measurement is the inseam._

For a 14-year-old boy, the average inseam is around 25-30 inches. Using the formula above, this would give a corresponding frame size of 16-20 inches. However, it is important to note that these measurements are averages and may vary depending on the individual's body proportions.

It is always best to consult with a bicycle shop or expert for a proper bike fitting to ensure that the boy gets the correct size bike for their needs and comfort. They can provide professional advice and make any necessary adjustments to the bike's fit, such as the seat height, handlebar position, and stem length.