Barum Polaris 6 235/45 R20

Barum Polaris 6 is a winter tyre made in total of 106 sizes, ranging from R14 to R14 - this particular dimension is R20, which means it fits to a 20 inch/508mm diameter wheel. 235/45 R20 is 80mm wider than the narrowest dimension (155) and 20mm narrower than the widest one (255). This tyre profile of 45 means the sidewall height of the tyre is 45% of the tyre width (235mm), which results in 105.75mm sidewall height. In 235/45 R20, Polaris 6 usually competes against Speed-Grip 5, which is a tyre from Semperit with a rating of 80%, compared to 83% of the Barum in question.