Cooper Zeon CS8 is a summer tyre made in total of 167 sizes, ranging from R13 to R13 - this particular dimension is R18, which means it fits to a 18 inch/457.2mm diameter wheel. 255/45 R18 is 70mm wider than the narrowest dimension (185) and 0mm narrower than the widest one (255). This tyre profile of 45 means the sidewall height of the tyre is 45% of the tyre width (255mm), which results in 114.75mm sidewall height. In
255/45 R18, Zeon CS8 usually competes against
Bravuris 5 HM, which is a tyre from
Barum with a rating of 44%, compared to 38% of the
Cooper in question.