BFGoodrich Trail Terrain T/A 255/65 R17

BFGoodrich Trail Terrain T/A is a winter tyre made in total of 48 sizes, ranging from R15 to R15 - this particular dimension is R17, which means it fits to a 17 inch/431.8mm diameter wheel. 255/65 R17 is 20mm wider than the narrowest dimension (235) and 30mm narrower than the widest one (285). This tyre profile of 65 means the sidewall height of the tyre is 65% of the tyre width (255mm), which results in 165.75mm sidewall height.