Vredestein Quatrac Pro is a allround tyre made in total of 106 sizes, ranging from R17 to R17 - this particular dimension is R20, which means it fits to a 20 inch/508mm diameter wheel. This tyre profile of 55 means the sidewall height of the tyre is 55% of the tyre width (195mm), which results in 107.25mm sidewall height. In 195/55 R20, there is only one possible speed index for Vredestein Quatrac Pro - "", which is good for speeds up to km/h.