The bags you see in this pic Is the stiffest they offer....although I knew they would be too stiff, I wanted to try just too see..if the RV was my only one, and I was going to constantly tow something heavy...I would go with these... I installed them to 3/4"" compression, that and with a spring bar hitch...it would be perfect... but , just like an unloaded dually, the ride would suffer..so I have the option to go with a less durometer bag...right now it has a slight bucking in the rear, which I could fix with custom shocks with more rebound...


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