Firestone Firehawk Sport 235/40 R18

Firestone Firehawk Sport is a summer tyre made in total of 36 sizes, ranging from R18 to R18 - this particular dimension is R18, which means it fits to a 18 inch/457.2mm diameter wheel. 235/40 R18 is 20mm wider than the narrowest dimension (215) and 40mm narrower than the widest one (275). This tyre profile of 40 means the sidewall height of the tyre is 40% of the tyre width (235mm), which results in 94mm sidewall height. In 235/40 R18, Firehawk Sport usually competes against Roadhawk 2, which is a tyre from Firestone with a rating of 81%, compared to 78% of the Firestone in question.