What does tire size 265/65r17 mean?

[VincentLee]

Automotive tire size 265/65R17 indicates: 265mm tread width; 65 represents the aspect ratio (tire height ÷ tire width) (65 means 65%); R denotes the tire has a radial structure with steel belts; 17 indicates the rim diameter is 17 inches. Precautions for tire purchase and usage are as follows: 1. When purchasing tires, always check the production date: Avoid buying tires with very old production dates. As rubber products, tires will age even when not in use. 2. During regular vehicle use, frequently inspect tire pressure and check for surface damage: Tire sidewalls are particularly vulnerable, and if punctured or cut, they cannot be repaired. It is recommended that owners replace tires every four years, even if the mileage during that period is relatively low.