The stock rims on my truck were 17 1/2 inch rims, and only one tire was still good. Replacement 17 1/2 inch tires was pretty spendy since it is such an odd size tire. So I found replacement 8 lug 16 inch rims. The tread width appears to be the same as the old tires. Do you still think that is making a big difference? When you say you went to new wheels, what size rims and tires did you put on it? When you say "with BFG's" what do you mean? Big F***ing something??? lol