Nankang Sportnex NS-2R 305/30 R20

Nankang Sportnex NS-2R is a tyre made in total of 47 sizes, ranging from R13 to R13 - this particular dimension is R20, which means it fits to a 20 inch/508mm diameter wheel. 305/30 R20 is 130mm wider than the narrowest dimension (175) and 0mm narrower than the widest one (305). This tyre profile of 30 means the sidewall height of the tyre is 30% of the tyre width (305mm), which results in 91.5mm sidewall height.