Bridgestone Blizzak 6 285/30 R21

Bridgestone Blizzak 6 is a winter tyre made in total of 225 sizes, ranging from R16 to R16 - this particular dimension is R21, which means it fits to a 21 inch/533.4mm diameter wheel. 285/30 R21 is 100mm wider than the narrowest dimension (185) and 40mm narrower than the widest one (325). This tyre profile of 30 means the sidewall height of the tyre is 30% of the tyre width (285mm), which results in 85.5mm sidewall height.