I found the easiest way to get the axle nuts off was to take the entire back plastic off including the air box so you have room to actually sit on the tire giving you more leverage. What I did was take a teeny bit of WD40 and spray in between the 2 of them and give it one good umph TIGHTENING it and then one good umph the other way just to crack the nut, spray a little more WD in there and do the same thing over and over until you get a good bite and they eventually spin right off. BTW the axle nut is a 1 7/8" crescent or box wrench, or u can use a pipe wrench, but youll end up with those little teeth marks in the surface, and theyre ugly. Dont worry about the WD, youll clean all that off at the end with brake cleaner before you repack the carrier.