Pirelli P ZERO Nero 215/40 R18

Pirelli P ZERO Nero is a summer tyre made in total of 4 sizes, ranging from R17 to R17 - this particular dimension is R18, which means it fits to a 18 inch/457.2mm diameter wheel. 215/40 R18 is 10mm wider than the narrowest dimension (205) and 0mm narrower than the widest one (215). This tyre profile of 40 means the sidewall height of the tyre is 40% of the tyre width (215mm), which results in 86mm sidewall height.