255/40 R20 Firestone Firehawk Sport variants

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Firestone Firehawk Sport is a summer tyre made in total of 33 sizes, ranging from R18 to R18 - this particular dimension is R20, which means it fits to a 20 inch/508mm diameter wheel. 255/40 R20 is 40mm wider than the narrowest dimension (215) 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, Firehawk Sport usually competes against Azenis Fk520, which is a tyre from Falken with a rating of 75%, compared to 70% of the Firestone in question.