Hankook Ventus Prime2 K115 is a summer tyre made in total of 57 sizes, ranging from R15 to R15 - this particular dimension is R16, which means it fits to a 16 inch/406.4mm diameter wheel. 225/45 R16 is 30mm wider than the narrowest dimension (195) and 20mm narrower than the widest one (245). This tyre profile of 45 means the sidewall height of the tyre is 45% of the tyre width (225mm), which results in 101.25mm sidewall height. In 225/45 R16, there is only one possible speed index for Hankook Ventus Prime2 K115 - "W", which is good for speeds up to 270 km/h.