Michelin Pilot Sport 4 315/30 R21

Michelin Pilot Sport 4 is a summer tyre made in total of 185 sizes, ranging from R16 to R16 - this particular dimension is R21, which means it fits to a 21 inch/533.4mm diameter wheel. 315/30 R21 is 110mm wider than the narrowest dimension (205) and 10mm narrower than the widest one (325). 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, Pilot Sport 4 usually competes against P ZERO PZ4, which is a tyre from Pirelli with a rating of 89%, compared to 0% of the Michelin in question.