Hankook Kinergy 4S2 H750 is a allround tyre made in total of 81 sizes, ranging from R14 to R14 - this particular dimension is R16, which means it fits to a 16 inch/406.4mm diameter wheel. 185/55 R16 is 30mm wider than the narrowest dimension (155) and 70mm narrower than the widest one (255). 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 R16, there is only one possible speed index for Hankook Kinergy 4S2 H750 - "V", which is good for speeds up to 240 km/h.