Hankook Ventus Prime2 K115 is a summer tyre made in total of 57 sizes, ranging from R15 to R15 - this particular dimension is R17, which means it fits to a 17 inch/431.8mm diameter wheel. 215/45 R17 is 20mm wider than the narrowest dimension (195) and 30mm narrower than the widest one (245). 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 R17, there is only one possible speed index for Hankook Ventus Prime2 K115 - "H", which is good for speeds up to 210 km/h.