Michelin CrossClimate+ (!) is a summer tyre made in total of 0 sizes, ranging from R13 to R13 - this particular dimension is R19, which means it fits to a 19 inch/482.6mm diameter wheel. 255/50 R19 is 255mm wider than the narrowest dimension () and -255mm narrower than the widest one (). This tyre profile of 50 means the sidewall height of the tyre is 50% of the tyre width (255mm), which results in 127.5mm sidewall height. In 255/50 R19, CrossClimate+ (!) usually competes against , which is a tyre from with a rating of %, compared to 0% of the Michelin in question.