Yokohama BluEarth winter V905 325/30 R21

Yokohama BluEarth winter V905 is a winter tyre made in total of 533 sizes, ranging from R13 to R13 - this particular dimension is R21, which means it fits to a 21 inch/533.4mm diameter wheel. 325/30 R21 is 180mm wider than the narrowest dimension (145) and -10mm narrower than the widest one (315). This tyre profile of 30 means the sidewall height of the tyre is 30% of the tyre width (325mm), which results in 97.5mm sidewall height.