Uniroyal RainSport 5 275/45 R21

Uniroyal RainSport 5 is a summer tyre made in total of 137 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 (295). 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, RainSport 5 usually competes against Goodrich Advantage 2, which is a tyre from BF with a rating of 67%, compared to 69% of the Uniroyal in question.