285/45 R21 Semperit Speed-Life 3 variants

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Semperit Speed-Life 3 is a summer tyre made in total of 113 sizes, ranging from R15 to R15 - this particular dimension is R21, which means it fits to a 21 inch/533.4mm diameter wheel. 285/45 R21 is 120mm wider than the narrowest dimension (165) and 10mm narrower than the widest one (295). 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, Speed-Life 3 usually competes against Roadhawk, which is a tyre from Firestone with a rating of 59%, compared to 59% of the Semperit in question.