Mine has the standard steel XJ/YJ 15's. They look like they have the same offset as the factory wheels, no clearance issues and no wheel spacers required. With the shallow center caps like I have, there isn't enough clearance for the axle nuts in the rear. A 1" wheel spacer would make room for the caps, or the easier solution is to get the earlier style center caps which are bigger and provide enough room.
I'm running 215-75 BFG All Terrains which required a mild trim at the end of the rocker panel to keep them from rubbing when turning. The size isn't throwing off the speedometer much, according to my GPS it only reads about 2 mph higher than actual. I think the speedo's are a bit conservative with the stock diameter tires.
The first pic is with the old Goodyears, the second is with the BFG's in the same size, and the 2" spacer installed in the front (original coils).