Michelin Primacy 4 is a summer tyre made in total of 383 sizes, ranging from R14 to R14 - this particular dimension is R17, which means it fits to a 17 inch/431.8mm diameter wheel. 235/55 R17 is 80mm wider than the narrowest dimension (155) and 70mm narrower than the widest one (305). This tyre profile of 55 means the sidewall height of the tyre is 55% of the tyre width (235mm), which results in 129.25mm sidewall height. In 235/55 R17, there are 3 possible speed indexes for Michelin Primacy 4 - "V","W","Y", which are good for speeds up to 240, 270, 300 km/h. Latest test in 235/55 R17 was held by ADAC in 2020, where Primacy 4 received rating "Recommended" and finished on the 1. place. It was tested on a Ford Kuga.