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. 275/35 R21 is 60mm wider than the narrowest dimension (215) and 50mm narrower than the widest one (325). This tyre profile of 35 means the sidewall height of the tyre is 35% of the tyre width (275mm), which results in 96.25mm sidewall height. In
275/35 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.