Federal Evoluzion ST-1 is a summer tyre made in total of 31 sizes, ranging from R16 to R16 - this particular dimension is R17, which means it fits to a 17 inch/431.8mm diameter wheel. 225/50 R17 is 30mm wider than the narrowest dimension (195) and 50mm narrower than the widest one (275). This tyre profile of 50 means the sidewall height of the tyre is 50% of the tyre width (225mm), which results in 112.5mm sidewall height. In 225/50 R17, there is only one possible speed index for Federal Evoluzion ST-1 - "Y", which is good for speeds up to 300 km/h. In 225/50 R17, Evoluzion ST-1 usually competes against ZV7, which is a tyre from Avon with a rating of 17%, compared to 36% of the Federal in question. Latest test in 225/50 R17 was held by Teknikens in 2020, where Evoluzion ST-1 received rating "" and finished on the 8. place. It was tested on a Volvo V90.
