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. 275/45 R20 is 100mm wider than the narrowest dimension (175) and -30mm narrower than the widest one (245). This tyre profile of 45 means the sidewall height of the tyre is 45% of the tyre width (275mm), which results in 123.75mm sidewall height. In 275/45 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.