What does the tire code 18560r15 represent?

[Julia]

Tire code 18560r15 represents the following: 185 indicates the tire section width in millimeters, typically ranging from 145 to 285mm in 10mm increments. The letter R stands for Radial, denoting the tire's radial ply construction. 15 refers to the rim diameter in inches. 60 is the aspect ratio, which is the ratio of the tire's sidewall height to its section width; 60 represents 60%. Generally, tire aspect ratios range between 30% to 80%. Under normal circumstances, regular passenger cars should not use tires with aspect ratios exceeding 75%, while luxury cars and high-performance sports cars are recommended to use tires with aspect ratios below 60%.