Michelin Primacy 4 245/40 R21

Michelin Primacy 4 is a summer tyre made in total of 367 sizes, ranging from R14 to R14 - this particular dimension is R21, which means it fits to a 21 inch/533.4mm diameter wheel. 245/40 R21 is 90mm wider than the narrowest dimension (155) and 60mm narrower than the widest one (305). This tyre profile of 40 means the sidewall height of the tyre is 40% of the tyre width (245mm), which results in 98mm sidewall height. In 245/40 R21, 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.