Michelin Pilot Sport CUP 2 315/30 R21

Michelin Pilot Sport CUP 2 is a summer tyre made in total of 138 sizes, ranging from R17 to R17 - this particular dimension is R21, which means it fits to a 21 inch/533.4mm diameter wheel. 315/30 R21 is 100mm wider than the narrowest dimension (215) 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 CUP 2 usually competes against Eagle F1 Supersport, which is a tyre from Goodyear with a rating of 81%, compared to 79% of the Michelin in question.