275/45 R21 Cooper Zeon CS8 variants

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Cooper Zeon CS8 is a summer tyre made in total of 121 sizes, ranging from R15 to R15 - this particular dimension is R21, which means it fits to a 21 inch/533.4mm diameter wheel. 275/45 R21 is 90mm wider than the narrowest dimension (185) and -20mm narrower than the widest one (255). This tyre profile of 45 means the sidewall height of the tyre is 45% of the tyre width (275mm), which results in 123.75mm sidewall height. In 275/45 R21, Zeon CS8 usually competes against Advantage, which is a tyre from BFGoodrich with a rating of 68%, compared to 42% of the Cooper in question.