Firestone Roadhawk 235/45 R17

Firestone Roadhawk is a summer tyre made in total of 165 sizes, ranging from R15 to R15 - this particular dimension is R17, which means it fits to a 17 inch/431.8mm diameter wheel. 235/45 R17 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 R17, Roadhawk usually competes against Summer, which is a tyre from Cooper with a rating of 55%, compared to 52% of the Firestone in question.