Nankang Winter Activa SV-55 315/35 R20

Nankang Winter Activa SV-55 is a winter tyre made in total of 53 sizes, ranging from R15 to R15 - this particular dimension is R20, which means it fits to a 20 inch/508mm diameter wheel. 315/35 R20 is 120mm wider than the narrowest dimension (195) and 0mm narrower than the widest one (315). This tyre profile of 35 means the sidewall height of the tyre is 35% of the tyre width (315mm), which results in 110.25mm sidewall height.