285/45 R21 Uniroyal MS plus 77 variants

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Uniroyal MS plus 77 is a winter tyre made in total of 76 sizes, ranging from R13 to R13 - this particular dimension is R21, which means it fits to a 21 inch/533.4mm diameter wheel. 285/45 R21 is 140mm wider than the narrowest dimension (145) and -30mm narrower than the widest one (255). This tyre profile of 45 means the sidewall height of the tyre is 45% of the tyre width (285mm), which results in 128.25mm sidewall height. In 285/45 R21, MS plus 77 usually competes against WR Snowproof, which is a tyre from Nokian with a rating of 55%, compared to 55% of the Uniroyal in question.