Westlake SU318 HT 255/60 R18

Westlake SU318 HT is a summer tyre made in total of 12 sizes, ranging from R15 to R15 - this particular dimension is R18, which means it fits to a 18 inch/457.2mm diameter wheel. 255/60 R18 is 30mm wider than the narrowest dimension (225) and 30mm narrower than the widest one (285). This tyre profile of 60 means the sidewall height of the tyre is 60% of the tyre width (255mm), which results in 153mm sidewall height.