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255/40 R18 Firestone Roadhawk 2 variants
Firestone Roadhawk 2 is a summer tyre made in total of 56 sizes, ranging from R17 to R17 - this particular dimension is R18, which means it fits to a 18 inch/457.2mm diameter wheel. 255/40 R18 is 60mm wider than the narrowest dimension (195) 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 R18, there is only one possible speed index for Firestone Roadhawk 2 - "Y", which is good for speeds up to 300 km/h.
Firestone Roadhawk 2 is made in 56 sizes, starting from 195/45 R17 up to 275/45 R21.
