Nankang Noble Sport NS-20 255/30 R20

Nankang Noble Sport NS-20 is a summer tyre made in total of 168 sizes, ranging from R13 to R13 - this particular dimension is R20, which means it fits to a 20 inch/508mm diameter wheel. 255/30 R20 is 60mm wider than the narrowest dimension (195) and -10mm narrower than the widest one (245). This tyre profile of 30 means the sidewall height of the tyre is 30% of the tyre width (255mm), which results in 76.5mm sidewall height.