Hankook Dynapro AT-M RF10 is a summer tyre made in total of 34 sizes, ranging from R15 to R15 - this particular dimension is R17, which means it fits to a 17 inch/431.8mm diameter wheel. 265/70 R16.5 is 70mm wider than the narrowest dimension (195) and -10mm narrower than the widest one (255). This tyre profile of 70 means the sidewall height of the tyre is 70% of the tyre width (265mm), which results in 185.5mm sidewall height. In 265/70 R16.5, there are 2 possible speed indexes for Hankook Dynapro AT-M RF10 - "T","S", which are good for speeds up to 190, 180 km/h.