Michelin Pilot Sport CUP 2 is a summer tyre made in total of 138 sizes, ranging from R17 to R17 - this particular dimension is R18, which means it fits to a 18 inch/457.2mm diameter wheel. 245/40 R18 is 30mm wider than the narrowest dimension (215) and 80mm narrower than the widest one (325). This tyre profile of 40 means the sidewall height of the tyre is 40% of the tyre width (245mm), which results in 98mm sidewall height. In
245/40 R18, Pilot Sport CUP 2 usually competes against
Eagle F1 Supersport, which is a tyre from
Goodyear with a rating of 81%, compared to 79% of the
Michelin in question.