Kumho Ecsta PS71 is a summer tyre made in total of 174 sizes, ranging from R16 to R16 - this particular dimension is R18, which means it fits to a 18 inch/457.2mm diameter wheel. 245/45 R18 is 50mm wider than the narrowest dimension (195) and 70mm narrower than the widest one (315). This tyre profile of 45 means the sidewall height of the tyre is 45% of the tyre width (245mm), which results in 110.25mm sidewall height. In 245/45 R18, there is only one possible speed index for Kumho Ecsta PS71 - "Y", which is good for speeds up to 300 km/h. In 245/45 R18, Ecsta PS71 usually competes against RainSport 5, which is a tyre from Uniroyal with a rating of 62%, compared to 76% of the Kumho in question. Latest test in 245/45 R18 was held by Autobild in 2020, where Ecsta PS71 received rating "Conditionally recommended" and finished on the 17. place. It was tested on a BMW 5 series.
