Dunlop AMERICAN ELITE 180/55 R18

Dunlop AMERICAN ELITE is a summer tyre made in total of 10 sizes, ranging from R16 to R16 - this particular dimension is R18, which means it fits to a 18 inch/457.2mm diameter wheel. 180/55 R18 is 30mm wider than the narrowest dimension (150) and 60mm narrower than the widest one (240). 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.