[chuckster57]

Originally Posted by Canonman

My experience with X chocks is that the fore/aft space between the wheels will change as the front of the trailer is raised or lowered or during leveling. So, if the X chocks are applied prior to unhooking, they might loosen as the front of the trailer is raised to unhook. It's been my practice to chock the wheels with a standard heavy rubber chock and apply the X chock only after the Cougar is leveled. I think the X chock helps minimize trailer bounce too.

I have used Xchocks for the last 15 years. When you put them in place you just need to crank them to apply a fair amount of pressure. My old fiver was 37 feet long and weight in at about 12,500 pounds. My xchocks held it firm on a sloped campground spot more than once.

As you lower raise the tongue/King pin, the shackles will rotate and the wheels stay where you chocked them.