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275/30 R21 Kumho Ecsta PS91 variants
Kumho Ecsta PS91 is a summer tyre made in total of 48 sizes, ranging from R18 to R18 - this particular dimension is R21, which means it fits to a 21 inch/533.4mm diameter wheel. 275/30 R21 is 50mm wider than the narrowest dimension (225) and 0mm narrower than the widest one (275). This tyre profile of 30 means the sidewall height of the tyre is 30% of the tyre width (275mm), which results in 82.5mm sidewall height. In 275/30 R21, there is only one possible speed index for Kumho Ecsta PS91 - "Y", which is good for speeds up to 300 km/h. In 275/30 R21, Ecsta PS91 usually competes against P ZERO, which is a tyre from Pirelli with a rating of 61%, compared to 48% of the Kumho in question.
Kumho Ecsta PS91 is made in 48 sizes, starting from 225/40 R18 up to 275/30 R21.