Firestone Roadhawk 2 255/55 R18

Firestone Roadhawk 2 is a summer tyre made in total of 143 sizes, ranging from R16 to R16 - this particular dimension is R18, which means it fits to a 18 inch/457.2mm diameter wheel. 255/55 R18 is 70mm wider than the narrowest dimension (185) and 30mm narrower than the widest one (285). This tyre profile of 55 means the sidewall height of the tyre is 55% of the tyre width (255mm), which results in 140.25mm sidewall height. In 255/55 R18, Roadhawk 2 usually competes against Ecsta PS71, which is a tyre from Kumho with a rating of 86%, compared to 81% of the Firestone in question.