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235/45 R18 Firestone Roadhawk variants
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Firestone Roadhawk is a summer tyre made in total of 154 sizes, ranging from R15 to R15 - this particular dimension is R18, which means it fits to a 18 inch/457.2mm diameter wheel. 235/45 R18 is 70mm wider than the narrowest dimension (165) and 60mm narrower than the widest one (295). 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 R18, there is only one possible speed index for Firestone Roadhawk - "Y", which is good for speeds up to 300 km/h. In 235/45 R18, Roadhawk usually competes against RainSport 5, which is a tyre from Uniroyal with a rating of 62%, compared to 57% of the Firestone in question.
Firestone Roadhawk is made in 154 sizes, starting from 165/65 R15 up to 295/35 R21.
