Yokohama Bluearth AE-50 is a summer tyre made in total of 12 sizes, ranging from R14 to R14 - this particular dimension is R14, which means it fits to a 14 inch/355.6mm diameter wheel. This tyre profile of 70 means the sidewall height of the tyre is 70% of the tyre width (165mm), which results in 115.5mm sidewall height. In 165/70 R14, there is only one possible speed index for Yokohama Bluearth AE-50 - "H", which is good for speeds up to 210 km/h.