Nokian Hakkapeliitta R3 275/40 R18

Nokian Hakkapeliitta R3 is a winter tyre made in total of 78 sizes, ranging from R14 to R14 - this particular dimension is R18, which means it fits to a 18 inch/457.2mm diameter wheel. 275/40 R18 is 100mm wider than the narrowest dimension (175) and -10mm narrower than the widest one (265). This tyre profile of 40 means the sidewall height of the tyre is 40% of the tyre width (275mm), which results in 110mm sidewall height.