Michelin Primacy 4 205/65 R17.5

Michelin Primacy 4 is a summer tyre made in total of 367 sizes, ranging from R14 to R14 - this particular dimension is R18, which means it fits to a 18 inch/457.2mm diameter wheel. 205/65 R17.5 is 50mm wider than the narrowest dimension (155) and 100mm narrower than the widest one (305). This tyre profile of 65 means the sidewall height of the tyre is 65% of the tyre width (205mm), which results in 133.25mm sidewall height.