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255/40 R19 Firestone Roadhawk variants
Firestone Roadhawk is a summer tyre made in total of 148 sizes, ranging from R15 to R15 - this particular dimension is R19, which means it fits to a 19 inch/482.6mm diameter wheel. 255/40 R19 is 90mm wider than the narrowest dimension (165) and 40mm narrower than the widest one (295). 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 R19, there is only one possible speed index for Firestone Roadhawk - "Y", which is good for speeds up to 300 km/h. In 255/40 R19, Roadhawk usually competes against Dynaxer HP3, which is a tyre from Kleber with a rating of 41%, compared to 72% of the Firestone in question.
Firestone Roadhawk is made in 148 sizes, starting from 165/65 R15 up to 295/35 R21.
