Kumho TA31 215/50 R18

Kumho TA31 is a tyre made in total of 4 sizes, ranging from R16 to R16 - this particular dimension is R18, which means it fits to a 18 inch/457.2mm diameter wheel. 215/50 R18 is 10mm wider than the narrowest dimension (205) and 10mm narrower than the widest one (225). This tyre profile of 50 means the sidewall height of the tyre is 50% of the tyre width (215mm), which results in 107.5mm sidewall height.