Continental ContiTour 180/55 R18

Continental ContiTour is a summer tyre made in total of 10 sizes, ranging from R15 to R15 - this particular dimension is R18, which means it fits to a 18 inch/457.2mm diameter wheel. 180/55 R18 is 40mm wider than the narrowest dimension (140) and 0mm narrower than the widest one (180). This tyre profile of 55 means the sidewall height of the tyre is 55% of the tyre width (180mm), which results in 99mm sidewall height.