Pirelli Cinturato P7 All Season 315/30 R21

Pirelli Cinturato P7 All Season is a allround tyre made in total of 32 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 110mm wider than the narrowest dimension (205) and 0mm narrower than the widest one (315). 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.