Michelin Pilot Primacy 275/40 R19

Michelin Pilot Primacy is a summer tyre made in total of 9 sizes, ranging from R18 to R18 - this particular dimension is R19, which means it fits to a 19 inch/482.6mm diameter wheel. 275/40 R19 is 30mm wider than the narrowest dimension (245) and 0mm narrower than the widest one (275). This tyre profile of 40 means the sidewall height of the tyre is 40% of the tyre width (275mm), which results in 110mm sidewall height.