What are the tire widths and diameters of electric bicycles?

165 is the tire section width data, 70 is the height-width ratio, and 13 is the hub diameter. The tire section width is 165mm. The tire diameter can be calculated as follows:165x70x0.01x22+13x25.4 = 561.2mm. ..

If an R is printed on the tire wall, such as 175R 13, it means that the tire is meridian and its width is 175mm(6.9 inches). When it is installed on a wheel with a rim diameter of 13 inch (330mm), it is usually engraved with radial words.

Extended data:

In the early days, each country made bicycles according to its own system of dimensioning. The dimensioning methods of these different countries have caused this situation. The most troublesome situation is that tires of different sizes that are not interchangeable often have the same digital identification.

The traditional dimension system is based on the measurement of tire outer diameter. This method is usually in inches (26 inches, 27 inches, etc.). ) or centimeters (650,700, etc. ).