Do you trust plastic chocks to stabilize your Airstream? The all steel X-Chock ($50) wheel chock is placed between your two wheels and then you crank the tension with the included wrench. The X design locks your wheels in place and there’s no movement. Also available is an optional lock ($9) to secure the chock.
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Those look impressive, especially with the 4 points of contact. I had some metal ones that wouldn’t stop me from moving the trailer when I forgot them. The one point that would bother me on these is the nut on the top and having to rachet it. I also would have to do it upside down due to the skirting.
Here is what I have now and do like. http://www.rotochok.com/