Nankang Noble Sport NS-20 255/45 R18

Nankang Noble Sport NS-20 is a summer tyre made in total of 163 sizes, ranging from R13 to R13 - this particular dimension is R18, which means it fits to a 18 inch/457.2mm diameter wheel. 255/45 R18 is 60mm wider than the narrowest dimension (195) and -10mm narrower than the widest one (245). This tyre profile of 45 means the sidewall height of the tyre is 45% of the tyre width (255mm), which results in 114.75mm sidewall height.