So my new MX4800 with ag tires appears to be about 70" wide measured to the outside edges of each rear tire. However, the rim dish is mounted on the outside of the rim lugs, and it appears the dish can be mounted to the inside of the lug...pushing the rim itself out another 2" or so on each side. I'd be happy to gain 4" of width for added stability on steep slopes I mow. The dealer is doing the work since the loaded tires are so heavy.