Michelin Primacy 4 is a summer tyre made in total of 239 sizes, ranging from R15 to R15 - this particular dimension is R17, which means it fits to a 17 inch/431.8mm diameter wheel. 205/45 R17 is 40mm wider than the narrowest dimension (165) and 50mm narrower than the widest one (255). This tyre profile of 45 means the sidewall height of the tyre is 45% of the tyre width (205mm), which results in 92.25mm sidewall height. In 205/45 R17, there are 2 possible speed indexes for Michelin Primacy 4 - "H","V", which are good for speeds up to 210, 240 km/h. In 205/45 R17, Primacy 4 usually competes against PremiumContact 6, which is a tyre from Continental with a rating of 78%, compared to 82% of the Michelin in question.
