What Do Car Tire Model Numbers Represent?
2 Answers
Car tire specification model parameters are expressed in millimeters to indicate the section width and the percentage of the aspect ratio. Following this are: the tire type code, rim diameter (in inches), load index (code for permissible load capacity), and permissible vehicle speed code. The size model of the tire is as follows: 1. The tire model refers to the international standard tire code, expressed in millimeters to indicate the section width and the percentage of the aspect ratio, sequentially arranged as the tire type code, rim diameter (in inches), load index (or load capacity index), and maximum speed code. 2. Car tire sizes are generally in the form of numbers plus letters, and the meanings represented by these numbers and letters help in better selection, usage, and maintenance of the tires.
Those numbers and letters on tire models are not randomly written. For example, the 215/65 R16 I often see when driving: 215 represents the tire width of 215 millimeters—a wider tire may offer more stability but consumes more fuel; 65 is the aspect ratio, meaning the height is 65% of the width, and a higher value generally provides a more comfortable ride; R stands for radial construction, which most cars use; 16 is the rim diameter of 16 inches, which must match the wheel hub—just make sure to check this when buying new tires. Choosing the wrong model may cause the tire to rub against the chassis or leak air, affecting safety and handling. Regularly check tire pressure and wear, and don’t let them exceed their service life.
