What does 225/55r17 mean?

[BentleyRose]

225/55r17 refers to the specifications of a car tire. More details are as follows: 1. 225 indicates the tread width, 55 represents that the sidewall height is 55% of the tread width, and R17 denotes a 17-inch tire. 2. Car tire types have international standard tire codes, which express the section width and aspect ratio as a percentage in millimeters. When replacing tires, it is essential to use the same specifications as the original tires installed on the vehicle. If a car owner needs to change the tire specifications, they must go to a professional modification shop for tire upgrades or consult the car manufacturer. For small cars with displacements between 0.8-1.5, the corresponding front tire specifications range from 155/65R1373T to 175/70R1477H. For large cars with displacements between 1.6-6.0, the corresponding tire specifications range from 185/60R14 to 245/50R18.