Kumho Ecsta Sport (PS72) 255/40 R18

Kumho Ecsta Sport (PS72) is a summer tyre made in total of 105 sizes, ranging from R13 to R13 - this particular dimension is R18, which means it fits to a 18 inch/457.2mm diameter wheel. 255/40 R18 is 50mm wider than the narrowest dimension (205) and 20mm narrower than the widest one (275). This tyre profile of 40 means the sidewall height of the tyre is 40% of the tyre width (255mm), which results in 102mm sidewall height. In 255/40 R18, Ecsta Sport (PS72) usually competes against Ecsta PS71, which is a tyre from Kumho with a rating of 86%, compared to 87% of the Kumho in question.