Cooper Discoverer Winter 255/55 R18

Cooper Discoverer Winter is a winter tyre made in total of 91 sizes, ranging from R13 to R13 - this particular dimension is R18, which means it fits to a 18 inch/457.2mm diameter wheel. 255/55 R18 is 50mm wider than the narrowest dimension (205) and 40mm narrower than the widest one (295). This tyre profile of 55 means the sidewall height of the tyre is 55% of the tyre width (255mm), which results in 140.25mm sidewall height. In 255/55 R18, Discoverer Winter usually competes against BluEarth winter V905, which is a tyre from Yokohama with a rating of 0%, compared to 0% of the Cooper in question.