Nokian Powerproof 245/40 R20

Nokian Powerproof is a summer tyre made in total of 53 sizes, ranging from R17 to R17 - this particular dimension is R20, which means it fits to a 20 inch/508mm diameter wheel. 245/40 R20 is 40mm wider than the narrowest dimension (205) and 30mm narrower than the widest one (275). This tyre profile of 40 means the sidewall height of the tyre is 40% of the tyre width (245mm), which results in 98mm sidewall height. In 245/40 R20, Powerproof usually competes against Dynaxer HP5, which is a tyre from Kleber with a rating of 60%, compared to 0% of the Nokian in question.