What Do Those Numbers on Car Tires Mean?

[VonIsabel]

Those numbers on car tires represent the following: Taking 215/65R15 as an example: 215 is the section width of the tire, which is the width between the two sidewalls; 65 is the aspect ratio, which is the ratio of the tire's height to its width, indicating here that the height is 65% of the width—the smaller the number, the flatter the tire appears; R stands for the tire's construction, indicating that this tire has a radial structure, meaning its cord plies are arranged radially inside the tire body; 15 is the rim diameter, meaning this tire must be matched with a 15-inch rim. Tires are circular elastic rubber products mounted on various vehicles or machinery to roll on the ground. They are typically installed on metal rims to cushion external shocks, ensure contact with the road surface, and maintain the vehicle's driving performance.