Fatboys have solid wheels that will be a direct bolt on. I'd look for a 2000-2003 wheel....I know those years are a 100% fit. Years other than those, I'm not sure.
Fatboy, Night Train, and Deuce had solid stockers, 16x3 I believe for the '00 - '05 FX line. I know the fatboy and train are basically the same, so I think they are all pretty much interchangeable among the FX family, with the possible exception of spacing?
I have a solid rear from a deuce on my '03 night train. Has one of the SE 180/60/17's on it. I hate the look of it though. Doesnt match not one thing on my bike.