Michelin Primacy 4 is a summer tyre made in total of 239 sizes, ranging from R15 to R15 - this particular dimension is R19, which means it fits to a 19 inch/482.6mm diameter wheel. 205/55 R19 is 40mm wider than the narrowest dimension (165) and 50mm narrower than the widest one (255). This tyre profile of 55 means the sidewall height of the tyre is 55% of the tyre width (205mm), which results in 112.75mm sidewall height. In 205/55 R19, there are 2 possible speed indexes for Michelin Primacy 4 - "V","H", which are good for speeds up to 240, 210 km/h. In 205/55 R19, 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.