Firestone Multihawk 2 is a summer tyre made in total of 56 sizes, ranging from R13 to R13 - this particular dimension is R14, which means it fits to a 14 inch/355.6mm diameter wheel. 185/55 R14 is 50mm wider than the narrowest dimension (135) and 10mm narrower than the widest one (195). 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 R14, there is only one possible speed index for Firestone Multihawk 2 - "H", which is good for speeds up to 210 km/h. In 185/55 R14, Multihawk 2 usually competes against Dynaxer HP3, which is a tyre from Kleber with a rating of 41%, compared to 32% of the Firestone in question.