255/40 R20 Nokian Powerproof 1 variants
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Special: XL
Nokian Powerproof 1 is a summer tyre made in total of 54 sizes, ranging from R17 to R17 - this particular dimension is R20, which means it fits to a 20 inch/508mm diameter wheel. 255/40 R20 is 50mm wider than the narrowest dimension (205) 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 R20, there is only one possible speed index for Nokian Powerproof 1 - "Y", which is good for speeds up to 300 km/h. In 255/40 R20, Powerproof 1 usually competes against Potenza Sport, which is a tyre from Bridgestone with a rating of 91%, compared to 62% of the Nokian in question.
Nokian Powerproof 1 is made in 54 sizes, starting from 205/45 R17 up to 275/45 R20.
