Nankang Noble Sport NS-20 is a summer tyre made in total of 126 sizes, ranging from R14 to R14 - this particular dimension is R17, which means it fits to a 17 inch/431.8mm diameter wheel. 205/40 R17 is 50mm wider than the narrowest dimension (155) and 40mm narrower than the widest one (245). This tyre profile of 40 means the sidewall height of the tyre is 40% of the tyre width (205mm), which results in 82mm sidewall height. In 205/40 R17, there are 2 possible speed indexes for Nankang Noble Sport NS-20 - "W","V", which are good for speeds up to 270, 240 km/h.
