What does a 26 inch bike frame mean?

A 26-inch bike is a popular style of bike with wheels that measure 26” across. They are some of the most commonly ridden models because of their medium size, perfect for teenagers and smaller adults. The 26” measurement refers to the wheel rather than the frame size.

What does a 20 inch bike mean?

So when we talk about kids bike sizes in terms of 14, 16, 20 or 24, those numbers indicate the diameter of the wheels on the bike in inches.