BFGoodrich Advantage is a summer tyre made in total of 146 sizes, ranging from R14 to R14 - this particular dimension is R19, which means it fits to a 19 inch/482.6mm diameter wheel. 255/50 R19 is 100mm wider than the narrowest dimension (155) and 0mm narrower than the widest one (255). This tyre profile of 50 means the sidewall height of the tyre is 50% of the tyre width (255mm), which results in 127.5mm sidewall height. In 255/50 R19, Advantage usually competes against ZIEX ZE310 ECORUN, which is a tyre from Falken with a rating of 75%, compared to 68% of the BFGoodrich in question.