What is the tire specification model?
2 Answers
Tire specifications are commonly represented by a set of numbers. The first number indicates the tire section width, and the latter denotes the rim diameter, measured in inches. The international standard tire code expresses the section width and aspect ratio percentage in millimeters. This is followed by: tire type code, rim diameter (in inches), load index (permissible load mass code), and permissible speed code. Additional information: For example, in 175/70R-14-77H, 175 represents a tire width of 175MM, 70 indicates the tire's aspect ratio is 70%, meaning the section height is 70% of the width, the rim diameter is 14 inches, the load index is 77, and the speed rating is H. The functions of tires are: 1. To transmit driving force, braking force, and steering force for vehicle operation; 2. To support the vehicle load; 3. To reduce and absorb vibrations and impact forces during driving, preventing severe vibrations from damaging vehicle components.
I've been driving this old car for over a decade. The tire specification code is like a tire's ID card, usually visible as a combination of letters and numbers on the sidewall, such as the common '205/55 R16 91H'. The 205 indicates the tire width of 205 millimeters, affecting grip; 55 is the aspect ratio, meaning the sidewall height is 55% of the tire width – a higher ratio offers more comfort but weaker handling; R stands for radial construction, the standard for modern vehicles; 16 is the rim diameter in inches; 91 is the load index, capable of bearing 615 kilograms; H is the speed rating, with a maximum safe speed of 210 kilometers per hour. When choosing tires, match the original factory specifications – sports cars use low aspect ratio high-performance models, while SUVs opt for high load capacity types. I've used Michelin Primacy series for quiet and comfortable rides, and I recommend checking the tread depth annually – replace them if it's below 2 millimeters to avoid hydroplaning in rainy seasons or blowouts at high speeds.
