Kumho Ecsta PS71 SUV is a summer tyre made in total of 55 sizes, ranging from R17 to R17 - this particular dimension is R18, which means it fits to a 18 inch/457.2mm diameter wheel. 235/55 R18 is 20mm wider than the narrowest dimension (215) and 50mm narrower than the widest one (285). This tyre profile of 55 means the sidewall height of the tyre is 55% of the tyre width (235mm), which results in 129.25mm sidewall height. In 235/55 R18, there are 2 possible speed indexes for Kumho Ecsta PS71 SUV - "V","W", which are good for speeds up to 240, 270 km/h. In 235/55 R18, Ecsta PS71 SUV usually competes against Azenis FK510 SUV, which is a tyre from Falken with a rating of 67%, compared to 64% of the Kumho in question.