Pirelli P ZERO PZ4 215/50 R18

Pirelli P ZERO PZ4 is a summer tyre made in total of 700 sizes, ranging from R13 to R13 - this particular dimension is R18, which means it fits to a 18 inch/457.2mm diameter wheel. 215/50 R18 is 70mm wider than the narrowest dimension (145) and 120mm narrower than the widest one (335). This tyre profile of 50 means the sidewall height of the tyre is 50% of the tyre width (215mm), which results in 107.5mm sidewall height.