I used Harbor Freight wheel chocks for my dirt bikes, Honda Shadow and the R3T without a problem.
Until; I checked on the bike in the trailer after a trip from Michigan to Pittsburgh, PA and found the the bike leaning over and one of the front straps loose! The Harbor Freight chock had failed. The tubing snapped in the middle of the "Loop"!

The bike didn't go over because I strap the back down from the pannier guards to a floor D-ring. I use 4 Powertye Fat Straps.
I had to buy another one to get the bike home, but as soon as I got home I bought a Condor Trailer Chock. Very heavy duty! I am not going to take the chance of a chock failing again. I needed something I could trust. I also use it on the lift table.
My purpose for replying is not to criticize, but to share my experience.
Trailer Only Chock
▪ TRAILER KITS :: 1½" FAT STRAP TRAILER KIT - POWERTYE AMERICAN MADE TIE-DOWNS AND ACCESSORIES