Michelin Pilot Sport 4 S 315/35 R20

Michelin Pilot Sport 4 S is a summer tyre made in total of 195 sizes, ranging from R18 to R18 - this particular dimension is R20, which means it fits to a 20 inch/508mm diameter wheel. 315/35 R20 is 110mm wider than the narrowest dimension (205) and 0mm narrower than the widest one (315). This tyre profile of 35 means the sidewall height of the tyre is 35% of the tyre width (315mm), which results in 110.25mm sidewall height.