Kumho Ecsta HS52 225/55 R18

Kumho Ecsta HS52 is a summer tyre made in total of 109 sizes, ranging from R14 to R14 - this particular dimension is R18, which means it fits to a 18 inch/457.2mm diameter wheel. 225/55 R18 is 50mm wider than the narrowest dimension (175) and -30mm narrower than the widest one (195). This tyre profile of 55 means the sidewall height of the tyre is 55% of the tyre width (225mm), which results in 123.75mm sidewall height.