Nokian Snowproof 3P 285/40 R20

Nokian Snowproof 3P is a winter tyre made in total of 34 sizes, ranging from R17 to R17 - this particular dimension is R20, which means it fits to a 20 inch/508mm diameter wheel. 285/40 R20 is 80mm wider than the narrowest dimension (205) and -20mm narrower than the widest one (265). This tyre profile of 40 means the sidewall height of the tyre is 40% of the tyre width (285mm), which results in 114mm sidewall height.