Nokian WR A3 255/35 R20

Nokian WR A3 is a winter tyre made in total of 9 sizes, ranging from R16 to R16 - this particular dimension is R20, which means it fits to a 20 inch/508mm diameter wheel. 255/35 R20 is 60mm wider than the narrowest dimension (195) and 0mm narrower than the widest one (255). 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.