Imperial SnowDragon SUV is a winter tyre made in total of 15 sizes, ranging from R16 to R16 - this particular dimension is R20, which means it fits to a 20 inch/508mm diameter wheel. 275/40 R20 is 60mm wider than the narrowest dimension (215) and 0mm narrower than the widest one (275). This tyre profile of 40 means the sidewall height of the tyre is 40% of the tyre width (275mm), which results in 110mm sidewall height. In 275/40 R20, there is only one possible speed index for Imperial SnowDragon SUV - "V", which is good for speeds up to 240 km/h. In 275/40 R20, SnowDragon SUV usually competes against Hectorra 5, which is a tyre from Matador with a rating of 10%, compared to 0% of the Imperial in question.