Minerva Frostrack UHP is a winter tyre made in total of 67 sizes, ranging from R16 to R16 - this particular dimension is R21, which means it fits to a 21 inch/533.4mm diameter wheel. 255/40 R21 is 80mm wider than the narrowest dimension (175) and 40mm narrower than the widest one (295). This tyre profile of 40 means the sidewall height of the tyre is 40% of the tyre width (255mm), which results in 102mm sidewall height. In
255/40 R21, Frostrack UHP usually competes against
Blizzak LM-005, which is a tyre from
Bridgestone with a rating of 87%, compared to 0% of the
Minerva in question.
