I think you are probably right. Leave the tires on the same sides - just flip the wheel centers. Looks like you will gain a few inches. Now that's if the center CAN be flipped and rebolted. If your rear tires are filled with fluid - be VERY careful - they will be very heavy. I don't see any bolts between the wheel centers and the outer rims. Unless they are bolted - its a lost cause. Example - if the center is welded to the outer rims - its a "no deal".