What does tire aspect ratio mean?
1 Answers
The aspect ratio of a car tire refers to the percentage of the tire's sidewall height to its width. A smaller value indicates a flatter tire shape, while a relatively larger value makes the tire appear bulkier. More details are as follows: 1. Reasons for increasing tire width: To ensure sufficient load-bearing capacity and improve driving stability and grip, the width of tires and rims has to be continuously increased. As a result, the cross-sectional shape of tires has evolved from an approximately circular form to a flatter elliptical shape. However, with the increase in vehicle speed, the diameter of tires has been continuously reduced to lower the center of gravity and axis of the car. The lower the tire aspect ratio, the smoother the tire runs and the stronger the handling performance. 2. Passenger cars generally use radial tires: The specifications of radial tires include width, aspect ratio, inner diameter, and speed limit symbols. For example, a tire specification of 205/65R15 means the width between the two sidewalls of the tire is 205 millimeters, 65 represents the aspect ratio, "R" stands for radial tire, and 15 is the inner diameter of the tire, which is 15 inches. Some tires also have speed limit symbols marked with letters such as P, R, S, T, H, V, Z, representing various speed limit values.
