Michelin Primacy 3 is a summer tyre made in total of 175 sizes, ranging from R16 to R16 - this particular dimension is R16, which means it fits to a 16 inch/406.4mm diameter wheel. 225/55 R16 is 40mm wider than the narrowest dimension (185) and -30mm narrower than the widest one (195). This tyre profile of 55 means the sidewall height of the tyre is 55% of the tyre width (225mm), which results in 123.75mm sidewall height. In 225/55 R16, there are 3 possible speed indexes for Michelin Primacy 3 - "W","V","Y", which are good for speeds up to 270, 240, 300 km/h. In 225/55 R16, Primacy 3 usually competes against Efficient Grip Performance, which is a tyre from Goodyear with a rating of 84%, compared to 59% of the Michelin in question.