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First off … trucks that can adequately pull the larger RV's will ride stiff air bags or not compared to say a half ton … you can't have a velvet ride and be able to pull heavy trailers. I run about 30 - 34# of air in my Air Lift bags. They absorb the jolts from the road and bridge abutments but don't really make it ride any stiffer loaded. I let the air out to about 5-10# empty which returns it to the ride quality it always had empty … a bit stiff.
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