The wheel is centered by the taper on the lug nuts, not the center bore. The hole can be a bit larger. I know for instance the drums can be a real pita to remove, as the machining is so close. I would give them some extra clearance like .20 or so. Many years ago I machined out the center hole in 16" chevy rims by chucking them up on the rear of my rig, and fashioning a cutter with a carbide tooth in the end of a pipe. Set a round of firewood up close for a tool rest. Let out the clutch and you have a 6 cyl. metal lathe. This gave excellent results and I didn't have to pay for a ferry ride to the mainland to get to a machine shop.. I ran those wheels for 10 years with no problems. Kinda hillbilly I know, but I love that kind of stuff.
