Well I purchased a set a rear Timbrens for my truck. After one week of testing, I decided to return them, here is why. Extremely easy install, that's a given. They absolutely minimized the rock...
With Timbrens installed and camper on truck where the overloads in play or just barely touching.
Barely touching.......then more bounce. Installing larger overload bumpers might have taken the bounce out and would have made the overloads come into play.