What does 245 60R18 mean?
The 245/60R18 105T tire has the following features: the first three digits 245 refer to the width of the tire in millimetres. The second two-digit number 60 refers to the ratio between the height of the sidewall and the width of the tire. A 245/60R18 tire’s overall diameter is 29. It’s 9. In inch-format notation, the size can be expressed as 29. R18.