I have a 30' Jayco Jay flight. This is our first travel trailer. I recently leveled our trailer and when disconnected from my truck it rolled back about 2" and partially crushed my plastic wheel choc...
X-chocks work great for stabilizing the trailer, but as others have said wheel chocks are still supposed to be used. I know many dont use both and have never had a problem but last summer I did see one trailer that rolled off of the X-chocks and several feet down a slight incline. That camper said he never had a problem before. This year he was back and was using both. It is a good idea to retighten them once the trailer tires cool down. I usually check mine after about three hours.