Pirelli P ZERO Direzionale 245/45 R18

Pirelli P ZERO Direzionale is a summer tyre made in total of 2 sizes, ranging from R18 to R18 - this particular dimension is R18, which means it fits to a 18 inch/457.2mm diameter wheel. 245/45 R18 is 30mm wider than the narrowest dimension (215) and 0mm narrower than the widest one (245). This tyre profile of 45 means the sidewall height of the tyre is 45% of the tyre width (245mm), which results in 110.25mm sidewall height.