Kumho WinterCraft WP72 245/40 R18

Kumho WinterCraft WP72 is a winter tyre made in total of 50 sizes, ranging from R17 to R17 - this particular dimension is R18, which means it fits to a 18 inch/457.2mm diameter wheel. 245/40 R18 is 20mm wider than the narrowest dimension (225) and 10mm narrower than the widest one (255). This tyre profile of 40 means the sidewall height of the tyre is 40% of the tyre width (245mm), which results in 98mm sidewall height.