Nexen N blue HD plus is a summer tyre made in total of 138 sizes, ranging from R13 to R13 - this particular dimension is R14, which means it fits to a 14 inch/355.6mm diameter wheel. 165/65 R14 is 10mm wider than the narrowest dimension (155) and 70mm narrower than the widest one (235). This tyre profile of 65 means the sidewall height of the tyre is 65% of the tyre width (165mm), which results in 107.25mm sidewall height. In 165/65 R14, there are 2 possible speed indexes for Nexen N blue HD plus - "H","T", which are good for speeds up to 210, 190 km/h.