Continental CrossContact ATR is a winter tyre made in total of 52 sizes, ranging from R15 to R15 - this particular dimension is R20, which means it fits to a 20 inch/508mm diameter wheel. 275/40 R20 is 70mm wider than the narrowest dimension (205) 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 Continental CrossContact ATR - "W", which is good for speeds up to 270 km/h.
275/40 R20 is found on 8 vehicles: