Ran into a problem hauling the GV home. My wheel chocks were not designed for 12" wheels. Looking on ebay Condor was the only one for 8" to larger wheels at $159. I thought that was a little steep and I also need to accommodate my larger motorcycle tires.
I found something similar ( Venom) in design but for larger wheels on sale for $52. The rear tire holder is adjustable but not able to move far enough forward with current adjustment holes. Will simply drill some more holes with a drill press to accommodate the 12" tire (have to have the holes exact for the adjustment rod to go through both sides).