Pirelli P ZERO Rosso 285/40 R18

Pirelli P ZERO Rosso is a summer tyre made in total of 45 sizes, ranging from R16 to R16 - this particular dimension is R18, which means it fits to a 18 inch/457.2mm diameter wheel. 285/40 R18 is 80mm wider than the narrowest dimension (205) and 10mm narrower than the widest one (295). This tyre profile of 40 means the sidewall height of the tyre is 40% of the tyre width (285mm), which results in 114mm sidewall height.