Most Harley wheel hubs are the same thickness/width. The big difference in interchangeability is axle diameters have changed thru the years, and models.
A good way to see what will fit your bike is to go to a site like J&P cycle, and select a wheel, then look at the "fitment" chart. Rim width is very important, you can't change that much as it changes the overall width of a tire a little. It can get confusing.