Federal Evoluzion ST-1 is a summer tyre made in total of 36 sizes, ranging from R16 to R16 - this particular dimension is R19, which means it fits to a 19 inch/482.6mm diameter wheel. 255/40 R19 is 60mm wider than the narrowest dimension (195) and 20mm narrower than the widest one (275). This tyre profile of 40 means the sidewall height of the tyre is 40% of the tyre width (255mm), which results in 102mm sidewall height. In
255/40 R19, Evoluzion ST-1 usually competes against
Protech NewGen, which is a tyre from
Viking with a rating of 32%, compared to 31% of the
Federal in question.
