Continental WinterContact TS 850P SUV is a winter tyre made in total of 194 sizes, ranging from R15 to R15 - this particular dimension is R21, which means it fits to a 21 inch/533.4mm diameter wheel. 275/45 R21 is 40mm wider than the narrowest dimension (235) and 10mm narrower than the widest one (285). This tyre profile of 45 means the sidewall height of the tyre is 45% of the tyre width (275mm), which results in 123.75mm sidewall height. In 275/45 R21, there are 2 possible speed indexes for Continental WinterContact TS 850P SUV - "V","W", which are good for speeds up to 240, 270 km/h. In 275/45 R21, 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.