Pirelli WINTER 270 SOTTOZERO SERIE II 275/40 R20

Pirelli WINTER 270 SOTTOZERO SERIE II is a winter tyre made in total of 30 sizes, ranging from R19 to R19 - this particular dimension is R20, which means it fits to a 20 inch/508mm diameter wheel. 275/40 R20 is 40mm wider than the narrowest dimension (235) and 30mm narrower than the widest one (305). This tyre profile of 40 means the sidewall height of the tyre is 40% of the tyre width (275mm), which results in 110mm sidewall height.