Firestone Winterhawk 4 is a winter tyre made in total of 100 sizes, ranging from R14 to R14 - this particular dimension is R15, which means it fits to a 15 inch/381mm diameter wheel. 185/55 R15 is 30mm wider than the narrowest dimension (155) and 90mm narrower than the widest one (275). This tyre profile of 55 means the sidewall height of the tyre is 55% of the tyre width (185mm), which results in 101.75mm sidewall height. In 185/55 R15, there are 2 possible speed indexes for Firestone Winterhawk 4 - "T","H", which are good for speeds up to 190, 210 km/h. In 185/55 R15, Winterhawk 4 usually competes against WR D4, which is a tyre from Nokian with a rating of 54%, compared to 69% of the Firestone in question.
Relevant tyre tests in same or similiar dimension (185/55 R15)
Name | Wet | Dry | Snow | Ice | Rolling resistance | Noise | Wear |
---|---|---|---|---|---|---|---|
Best values in test | 1,7 | 1,9 | 1,8 | 1,9 | 1,7 | 2,5 | 1,5 |
Firestone Winterhawk 4 | 2,0 | 3,2 | 2,2 | 2,1 | 1,7 | 2,8 | 2,5 |
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