I'll take measurements later but I think it will fit a 2.2 no problem.
Pictures in the first post here show measurements of the clearance. Smallest is 66mm. With reasonable clearance (6mm a side?) something like 2.1" should fit comfortably. 2.2" may be stretching it a bit. It would be good to see what you get in your measurements, though.
BTW, those wheels are awesome. Oh, and where did you get those bungs?