315/30 R21 Uniroyal RainSport 3 variants

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Uniroyal RainSport 3 is a summer tyre made in total of 110 sizes, ranging from R14 to R14 - this particular dimension is R21, which means it fits to a 21 inch/533.4mm diameter wheel. 315/30 R21 is 130mm wider than the narrowest dimension (185) and -40mm narrower than the widest one (275). This tyre profile of 30 means the sidewall height of the tyre is 30% of the tyre width (315mm), which results in 94.5mm sidewall height. In 315/30 R21, RainSport 3 usually competes against Roadhawk, which is a tyre from Firestone with a rating of 59%, compared to 0% of the Uniroyal in question.