Nokian Snowproof 3P 255/55 R18

Nokian Snowproof 3P is a winter tyre made in total of 34 sizes, ranging from R17 to R17 - this particular dimension is R18, which means it fits to a 18 inch/457.2mm diameter wheel. 255/55 R18 is 50mm wider than the narrowest dimension (205) and 10mm narrower than the widest one (265). This tyre profile of 55 means the sidewall height of the tyre is 55% of the tyre width (255mm), which results in 140.25mm sidewall height.