Continental SportContact 6 SUV is a summer tyre made in total of 20 sizes, ranging from R20 to R20 - this particular dimension is R20, which means it fits to a 20 inch/508mm diameter wheel. This tyre profile of 45 means the sidewall height of the tyre is 45% of the tyre width (265mm), which results in 119.25mm sidewall height. In 265/45 R20, there is only one possible speed index for Continental SportContact 6 SUV - "Y", which is good for speeds up to 300 km/h.