Nankang MT-1 L POR is a tyre made in total of 17 sizes, ranging from R15 to R15 - this particular dimension is R17, which means it fits to a 17 inch/431.8mm diameter wheel. 285/70 R17 is 255mm wider than the narrowest dimension (30) and -10mm narrower than the widest one (275). This tyre profile of 70 means the sidewall height of the tyre is 70% of the tyre width (285mm), which results in 199.5mm sidewall height. In 285/70 R17, there is only one possible speed index for Nankang MT-1 L POR - "", which is good for speeds up to km/h.