Pirelli P ZERO lx. 285/40 R20

Pirelli P ZERO lx. is a summer tyre made in total of 113 sizes, ranging from R18 to R18 - this particular dimension is R20, which means it fits to a 20 inch/508mm diameter wheel. 285/40 R20 is 60mm wider than the narrowest dimension (225) and 30mm narrower than the widest one (315). 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.