Continental sContact 155/90 R18

Continental sContact is a summer tyre made in total of 18 sizes, ranging from R16 to R16 - this particular dimension is R18, which means it fits to a 18 inch/457.2mm diameter wheel. 155/90 R18 is 30mm wider than the narrowest dimension (125) and 0mm narrower than the widest one (155). This tyre profile of 90 means the sidewall height of the tyre is 90% of the tyre width (155mm), which results in 139.5mm sidewall height.