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. 245/45 R20 is 70mm wider than the narrowest dimension (175) and 0mm narrower than the widest one (245). 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 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.