For the rims that I have in my inventory, the rims designed with the single use only offset do not have the (flanged) coned lug holes, and their offset will not allow the lug faces to touch each other when placing them side by side. The tire sidewalls make contact first leaving a space of over an inch between the rim faces. You may get by with 1 of each type rim space wise, but if they're not flanged for the dual setup I think you're going to have a problem keeping the lug nuts tightened. With only a 1/2" spacing between the tires when stacking the rims together I think your tires' inner sidewalls will rub against each other with any type of a load (maybe even unloaded) when the weight of the truck is placed on them. I like the looks of the single use rims on the front (nice offset) but I carry a spare for the duals which will work front or back. Just my $.02. Mike