Michelin Pilot Sport 4 SUV 255/40 R21

Michelin Pilot Sport 4 SUV is a summer tyre made in total of 142 sizes, ranging from R17 to R17 - this particular dimension is R21, which means it fits to a 21 inch/533.4mm diameter wheel. 255/40 R21 is 30mm wider than the narrowest dimension (225) and 80mm narrower than the widest one (335). This tyre profile of 40 means the sidewall height of the tyre is 40% of the tyre width (255mm), which results in 102mm sidewall height. In 255/40 R21, Pilot Sport 4 SUV usually competes against Eagle F1 Asymmetric 6, which is a tyre from Goodyear with a rating of 94%, compared to 93% of the Michelin in question.