Hankook Tl20 is a summer tyre made in total of 8 sizes, ranging from R19 to R19 - this particular dimension is R22, which means it fits to a 22 inch/558.8mm diameter wheel. This tyre profile of 55 means the sidewall height of the tyre is 55% of the tyre width (385mm), which results in 211.75mm sidewall height. In 385/55 R22, there is only one possible speed index for Hankook Tl20 - "K", which is good for speeds up to km/h.