Pirelli P Zero (PZ5) 315/40 R21

Pirelli P Zero (PZ5) is a summer tyre made in total of 76 sizes, ranging from R13 to R13 - this particular dimension is R21, which means it fits to a 21 inch/533.4mm diameter wheel. 315/40 R21 is 90mm wider than the narrowest dimension (225) and 10mm narrower than the widest one (325). This tyre profile of 40 means the sidewall height of the tyre is 40% of the tyre width (315mm), which results in 126mm sidewall height. In 315/40 R21, P Zero (PZ5) usually competes against Turanza T005, which is a tyre from Bridgestone with a rating of 88%, compared to 88% of the Pirelli in question.