Yokohama BluEarth winter V905 285/45 R21

Yokohama BluEarth winter V905 is a winter tyre made in total of 502 sizes, ranging from R13 to R13 - this particular dimension is R21, which means it fits to a 21 inch/533.4mm diameter wheel. 285/45 R21 is 140mm wider than the narrowest dimension (145) and 30mm narrower than the widest one (315). This tyre profile of 45 means the sidewall height of the tyre is 45% of the tyre width (285mm), which results in 128.25mm sidewall height.