Maybe on BIG tractors, but not on a JD4100. [img]/forums/images/icons/frown.gif[/img] At least not on a JD4100 with R4 tires and matching wheels. The wheels are one piece. The most you could do is turn the wheels inside out. But it looks as though the "dish" of the wheel is already to the inside. I'll have to measure over the weekend to be sure.