Hankook Ventus S1-evo is a summer tyre made in total of 0 sizes, ranging from R13 to R13 - this particular dimension is R20, which means it fits to a 20 inch/508mm diameter wheel. 345/25 R20 is 345mm wider than the narrowest dimension () and -345mm narrower than the widest one (). This tyre profile of 25 means the sidewall height of the tyre is 25% of the tyre width (345mm), which results in 86.25mm sidewall height.