Pirelli Scorpion ATR 255/60 R18

Pirelli Scorpion ATR is a summer tyre made in total of 20 sizes, ranging from R14 to R14 - this particular dimension is R18, which means it fits to a 18 inch/457.2mm diameter wheel. 255/60 R18 is 80mm wider than the narrowest dimension (175) and 70mm narrower than the widest one (325). This tyre profile of 60 means the sidewall height of the tyre is 60% of the tyre width (255mm), which results in 153mm sidewall height.