Federal Evoluzion ST-1 is a summer tyre made in total of 61 sizes, ranging from R13 to R13 - this particular dimension is R20, which means it fits to a 20 inch/508mm diameter wheel. 275/40 R20 is 80mm wider than the narrowest dimension (195) and 0mm narrower than the widest one (275). This tyre profile of 40 means the sidewall height of the tyre is 40% of the tyre width (275mm), which results in 110mm sidewall height. In
275/40 R20, Evoluzion ST-1 usually competes against
Protech NewGen, which is a tyre from
Viking with a rating of 40%, compared to 48% of the
Federal in question.
