Kumho WinterCraft WP72 275/30 R20

Kumho WinterCraft WP72 is a winter tyre made in total of 50 sizes, ranging from R17 to R17 - this particular dimension is R20, which means it fits to a 20 inch/508mm diameter wheel. 275/30 R20 is 50mm wider than the narrowest dimension (225) and -20mm narrower than the widest one (255). This tyre profile of 30 means the sidewall height of the tyre is 30% of the tyre width (275mm), which results in 82.5mm sidewall height.