What are the specifications of tires?

[JudahDella]

Common tire model specifications usually include 185/65R14, 185/65R15, and 205/55R16. Below is an example of size specifications (taking 195/55R15 as an example): 1.195: Section width, which is the area of the tire that can contact the ground, measured in millimeters. 2.55: Aspect ratio, which is the ratio of the tire's section height to its section width. 3.R: Construction code, where R stands for radial tire. Bias tires are denoted by the letter "B". Passenger car tires are generally radial tires. 4.15: Inner diameter of the tire, also the diameter of the wheel rim, usually measured in inches.