Pirelli Cinturato All Season is a allround tyre made in total of 33 sizes, ranging from R14 to R14 - this particular dimension is R18, which means it fits to a 18 inch/457.2mm diameter wheel. 245/45 R18 is 80mm wider than the narrowest dimension (165) and -90mm narrower than the widest one (155). This tyre profile of 45 means the sidewall height of the tyre is 45% of the tyre width (245mm), which results in 110.25mm sidewall height. In 245/45 R18, Cinturato All Season usually competes against Kinergy 4S2 H750, which is a tyre from Hankook with a rating of 89%, compared to 0% of the Pirelli in question.