Firestone Roadhawk 2 275/40 R22

Firestone Roadhawk 2 is a summer tyre made in total of 143 sizes, ranging from R16 to R16 - this particular dimension is R22, which means it fits to a 22 inch/558.8mm diameter wheel. 275/40 R22 is 90mm wider than the narrowest dimension (185) and 10mm narrower than the widest one (285). This tyre profile of 40 means the sidewall height of the tyre is 40% of the tyre width (275mm), which results in 110mm sidewall height.