Pirelli P Zero Winter is a winter tyre made in total of 108 sizes, ranging from R18 to R18 - this particular dimension is R21, which means it fits to a 21 inch/533.4mm diameter wheel. 255/50 R21 is 20mm wider than the narrowest dimension (235) and 60mm narrower than the widest one (315). This tyre profile of 50 means the sidewall height of the tyre is 50% of the tyre width (255mm), which results in 127.5mm sidewall height. In
255/50 R21, P Zero Winter usually competes against
Winter i*cept evo3 W330, which is a tyre from
Hankook with a rating of 87%, compared to 72% of the
Pirelli in question.
Winter
