Firestone Roadhawk 2 195/40 R17

Firestone Roadhawk 2 is a summer tyre made in total of 146 sizes, ranging from R16 to R16 - this particular dimension is R17, which means it fits to a 17 inch/431.8mm diameter wheel. 195/40 R17 is 10mm wider than the narrowest dimension (185) and 90mm narrower than the widest one (285). This tyre profile of 40 means the sidewall height of the tyre is 40% of the tyre width (195mm), which results in 78mm sidewall height.