Michelin Primacy 4 235/40 R18

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. 235/40 R18 is 80mm wider than the narrowest dimension (155) and 70mm narrower than the widest one (305). This tyre profile of 40 means the sidewall height of the tyre is 40% of the tyre width (235mm), which results in 94mm sidewall height. In 235/40 R18, Primacy 4 usually competes against Primacy 5, which is a tyre from Michelin with a rating of 86%, compared to 0% of the Michelin in question.