Continental WinterContact TS 850P SUV is a winter tyre made in total of 194 sizes, ranging from R15 to R15 - this particular dimension is R20, which means it fits to a 20 inch/508mm diameter wheel. 285/40 R20 is 50mm wider than the narrowest dimension (235) and 0mm narrower than the widest one (285). This tyre profile of 40 means the sidewall height of the tyre is 40% of the tyre width (285mm), which results in 114mm sidewall height. In 285/40 R20, there is only one possible speed index for Continental WinterContact TS 850P SUV - "V", which is good for speeds up to 240 km/h. In 285/40 R20, WinterContact TS 850P SUV usually competes against Blizzak LM-005, which is a tyre from Bridgestone with a rating of 92%, compared to 79% of the Continental in question.