Michelin Pilot Sport 4 S 255/30 R19

Michelin Pilot Sport 4 S is a summer tyre made in total of 195 sizes, ranging from R18 to R18 - this particular dimension is R19, which means it fits to a 19 inch/482.6mm diameter wheel. 255/30 R19 is 50mm wider than the narrowest dimension (205) and 60mm narrower than the widest one (315). This tyre profile of 30 means the sidewall height of the tyre is 30% of the tyre width (255mm), which results in 76.5mm sidewall height.