Atlas Polarbear 2 225/45 R18

Atlas Polarbear 2 is a winter tyre made in total of 11 sizes, ranging from R15 to R15 - this particular dimension is R18, which means it fits to a 18 inch/457.2mm diameter wheel. 225/45 R18 is 40mm wider than the narrowest dimension (185) and 10mm narrower than the widest one (235). This tyre profile of 45 means the sidewall height of the tyre is 45% of the tyre width (225mm), which results in 101.25mm sidewall height.