My 2015 Ram 2500 with the class 5 hitch I still use the bars when pulling my 32' LQ trailer which weighs around 11K lbs loaded. I use the bars loaded and unloaded. My 24' enclosed I don't use the bars either way, and for sure not on my 18' open. No air suspension just the newer s coils. It is pretty rough riding either way. snowblow

The funny thing about science is that if you change one miniscule parameter you change the entire outcome to the way you want it.

JB Rhinehart, Realist

A-Body's RULE!