Pirelli WINTER 210 SOTTOZERO SERIE II 255/40 R18

Pirelli WINTER 210 SOTTOZERO SERIE II is a winter tyre made in total of 30 sizes, ranging from R16 to R16 - this particular dimension is R18, which means it fits to a 18 inch/457.2mm diameter wheel. 255/40 R18 is 50mm wider than the narrowest dimension (205) and -20mm narrower than the widest one (235). This tyre profile of 40 means the sidewall height of the tyre is 40% of the tyre width (255mm), which results in 102mm sidewall height.