Royal Black Royal Performance 275/30 R20

Royal Black Royal Performance is a tyre made in total of 68 sizes, ranging from R15 to R15 - this particular dimension is R20, which means it fits to a 20 inch/508mm diameter wheel. 275/30 R20 is 80mm wider than the narrowest dimension (195) and 10mm narrower than the widest one (285). This tyre profile of 30 means the sidewall height of the tyre is 30% of the tyre width (275mm), which results in 82.5mm sidewall height.