Bfgoodrich Route Control T is a tyre made in total of 9 sizes, ranging from R17 to R17 - this particular dimension is R23, which means it fits to a 23 inch/584.2mm diameter wheel. 385/65 R22.5 is 170mm wider than the narrowest dimension (215) and 0mm narrower than the widest one (385). This tyre profile of 65 means the sidewall height of the tyre is 65% of the tyre width (385mm), which results in 250.25mm sidewall height. In 385/65 R22.5, there is only one possible speed index for Bfgoodrich Route Control T - "K", which is good for speeds up to km/h.