Dunlop All Season 2 is a allround tyre made in total of 39 sizes, ranging from R14 to R14 - this particular dimension is R15, which means it fits to a 15 inch/381mm diameter wheel. 175/65 R15 is 10mm wider than the narrowest dimension (165) and 70mm narrower than the widest one (245). This tyre profile of 65 means the sidewall height of the tyre is 65% of the tyre width (175mm), which results in 113.75mm sidewall height. In 175/65 R15, there is only one possible speed index for Dunlop All Season 2 - "H", which is good for speeds up to 210 km/h.