Semperit Speed-Life 2 is a summer tyre made in total of 81 sizes, ranging from R15 to R15 - this particular dimension is R16, which means it fits to a 16 inch/406.4mm diameter wheel. This tyre profile of 50 means the sidewall height of the tyre is 50% of the tyre width (185mm), which results in 92.5mm sidewall height. In 185/50 R16, there is only one possible speed index for Semperit Speed-Life 2 - "H", which is good for speeds up to 210 km/h.