Pirelli P Zero Winter 2 is a winter tyre made in total of 75 sizes, ranging from R18 to R18 - this particular dimension is R18, which means it fits to a 18 inch/457.2mm diameter wheel. 255/35 R18 is 20mm wider than the narrowest dimension (235) and 40mm narrower than the widest one (295). This tyre profile of 35 means the sidewall height of the tyre is 35% of the tyre width (255mm), which results in 89.25mm sidewall height.
Winter
Winter
