What is the diameter of a car tire?
1 Answers
There are three commonly used car tire specifications: 185/65R14, 185/65R15, and 205/55R16. Size explanation: Taking 185/65R14 as an example, 185 is the section width, which is the area of the tire that can contact the ground, measured in millimeters; 65 is the aspect ratio, which is the ratio of the tire's section height to its section width; R stands for radial tire; 14 is the inner diameter of the tire, which is the diameter of the wheel hub. Letter identification: Tires also have speed rating letters, indicating the maximum speed at which the tire can carry a specified load under specified conditions. Letters A to Z represent the certified speed ratings of tires from 4.8 kilometers per hour to 300 kilometers per hour.