John deere sells their tractos at the narrowest wheel width unless you make them change it. Like the previous posters, the lugs on the inside of the rim are not centered, and based on how they are bolted in you can get four different widths. You can't flip the dished hub because the cab won't let it fit otherwise. IF that still isn't wide enough by flipping the tires side to side and putting the lugs to the outside of the wheel hubs, Deere also sells axle extensions for the E. I believe they go all the way up to 4" per side? I know i have seen 1.2" and 1.8" possibly. If you want to know part numbers, go to the build your own page for the E and fill everything out, on the 2nd page it lists the axle extensions.