BFGoodrich Advantage SUV All Season is a allround tyre made in total of 7 sizes, ranging from R17 to R17 - this particular dimension is R20, which means it fits to a 20 inch/508mm diameter wheel. 255/45 R20 is 40mm wider than the narrowest dimension (215) and 0mm narrower than the widest one (255). This tyre profile of 45 means the sidewall height of the tyre is 45% of the tyre width (255mm), which results in 114.75mm sidewall height. In 255/45 R20, there is only one possible speed index for BFGoodrich Advantage SUV All Season - "W", which is good for speeds up to 270 km/h. In 255/45 R20, Advantage SUV All Season usually competes against Kinergy 4S2 H750, which is a tyre from Hankook with a rating of 88%, compared to 88% of the BFGoodrich in question.