Hankook Winter i*cept RS2 W452 is a winter tyre made in total of 88 sizes, ranging from R13 to R13 - this particular dimension is R16, which means it fits to a 16 inch/406.4mm diameter wheel. 185/55 R16 is 50mm wider than the narrowest dimension (135) and 40mm narrower than the widest one (225). 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 are 2 possible speed indexes for Hankook Winter i*cept RS2 W452 - "T","H", which are good for speeds up to 190, 210 km/h.