Imperial EcoSport 2 is a summer tyre made in total of 87 sizes, ranging from R15 to R15 - this particular dimension is R20, which means it fits to a 20 inch/508mm diameter wheel. 285/35 R20 is 90mm wider than the narrowest dimension (195) and -30mm narrower than the widest one (255). This tyre profile of 35 means the sidewall height of the tyre is 35% of the tyre width (285mm), which results in 99.75mm sidewall height. In 285/35 R20, there is only one possible speed index for Imperial EcoSport 2 - "Y", which is good for speeds up to 300 km/h.