What do the numbers on a tire represent?
1 Answers
The numbers on a tire represent its specifications. Taking 225/60R1799H as an example, 225 stands for the section width; 60 represents the aspect ratio; R is the tire type code, with R indicating a radial tire; 17 denotes the rim diameter; 99 is the load index, indicating the maximum weight the tire can bear; H represents the speed rating, showing the maximum speed the tire can handle. Tires, commonly referred to as such, are usually made of wear-resistant rubber materials and can be either solid or pneumatic. Pneumatic tires consist of an inner tube and an outer tire. Generally, manufacturers set the service life of a tire at 3 years. If a vehicle is driven 20,000 kilometers a year, replacement may be considered after 2 to 3 years.