CST Medallion MD-A1 is a summer tyre made in total of 29 sizes, ranging from R16 to R16 - this particular dimension is R16, which means it fits to a 16 inch/406.4mm diameter wheel. 215/45 R16 is 20mm wider than the narrowest dimension (195) and 20mm narrower than the widest one (235). This tyre profile of 45 means the sidewall height of the tyre is 45% of the tyre width (215mm), which results in 96.75mm sidewall height. In 215/45 R16, there is only one possible speed index for CST Medallion MD-A1 - "V", which is good for speeds up to 240 km/h.