Dunlop Grandtrek PT4000 is a tyre made in total of 2 sizes, ranging from R17 to R17 - this particular dimension is R17, which means it fits to a 17 inch/431.8mm diameter wheel. This tyre profile of 65 means the sidewall height of the tyre is 65% of the tyre width (235mm), which results in 152.75mm sidewall height. In 235/65 R17, there is only one possible speed index for Dunlop Grandtrek PT4000 - "V", which is good for speeds up to 240 km/h.