About the size of the bike

1. Label based on wheel diameter. Usually 12 ", 16 ", 20 "are the diameter of the wheel," inch "is the inch, every inch is 2.54 centimeters, so the 16-inch bicycle wheel diameter should be 40.6 centimeters, the largest 29-inch bicycle wheel diameter should be 73.7 centimeters.

2. Label based on frame height. In addition to the wheel diameter of the bike model, there is a version of the height of the frame. Frame height refers to the length from the bottom of the pedal to the top of the seat pole. The 15-inch bikes under this label are usually suitable for children between 150 cm and 165 cm tall.

3. Whether it is based on wheel diameter or frame height, the bike model is mainly used to represent the height of the bike. Of course, taller bikes tend to be longer and have wider handlebars.