265/40 R21 Falken ZIEX ZE310 Ecorun variants

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Falken ZIEX ZE310 Ecorun is a summer tyre made in total of 150 sizes, ranging from R14 to R14 - this particular dimension is R21, which means it fits to a 21 inch/533.4mm diameter wheel. 265/40 R21 is 80mm wider than the narrowest dimension (185) and -40mm narrower than the widest one (225). This tyre profile of 40 means the sidewall height of the tyre is 40% of the tyre width (265mm), which results in 106mm sidewall height. In 265/40 R21, ZIEX ZE310 Ecorun usually competes against Advantage, which is a tyre from BFGoodrich with a rating of 68%, compared to 75% of the Falken in question.