Goodyear Kmax T is a allround tyre made in total of 19 sizes, ranging from R17 to R17 - this particular dimension is R22, which means it fits to a 22 inch/558.8mm diameter wheel. 385/55 R22 is 180mm wider than the narrowest dimension (205) and 0mm narrower than the widest one (385). This tyre profile of 55 means the sidewall height of the tyre is 55% of the tyre width (385mm), which results in 211.75mm sidewall height. In 385/55 R22, there is only one possible speed index for Goodyear Kmax T - "K", which is good for speeds up to km/h.