Royal Black Royalwinter UHP is a winter tyre made in total of 37 sizes, ranging from R16 to R16 - this particular dimension is R20, which means it fits to a 20 inch/508mm diameter wheel. 255/50 R20 is 40mm wider than the narrowest dimension (215) and 20mm narrower than the widest one (275). This tyre profile of 50 means the sidewall height of the tyre is 50% of the tyre width (255mm), which results in 127.5mm sidewall height. In
255/50 R20, Black winter UHP usually competes against
Snowpower UHP, which is a tyre from
Tristar with a rating of 0%, compared to 16% of the
Royal in question.
Winter
