Kumho Ecsta PS91 is a summer tyre made in total of 48 sizes, ranging from R18 to R18 - this particular dimension is R19, which means it fits to a 19 inch/482.6mm diameter wheel. 245/35 R19 is 20mm wider than the narrowest dimension (225) and 30mm narrower than the widest one (275). This tyre profile of 35 means the sidewall height of the tyre is 35% of the tyre width (245mm), which results in 85.75mm sidewall height. In 245/35 R19, there is only one possible speed index for Kumho Ecsta PS91 - "Y", which is good for speeds up to 300 km/h. In 245/35 R19, Ecsta PS91 usually competes against P ZERO, which is a tyre from Pirelli with a rating of 66%, compared to 53% of the Kumho in question.