Kumho Ecsta HS52 is a summer tyre made in total of 88 sizes, ranging from R14 to R14 - this particular dimension is R20, which means it fits to a 20 inch/508mm diameter wheel. 255/35 R20 is 80mm wider than the narrowest dimension (175) and -10mm narrower than the widest one (245). This tyre profile of 35 means the sidewall height of the tyre is 35% of the tyre width (255mm), which results in 89.25mm sidewall height. In 255/35 R20, Ecsta HS52 usually competes against Dynaxer HP4, which is a tyre from Kleber with a rating of 76%, compared to 78% of the Kumho in question.