I have an 811 on a 2013 GMC Sierra 3500 with single rear wheels. I put Firestone air springs on it and it rides fine. Without the airbags it felt soft and I took corners gently. I still don’t go over 60 mph and bad roads make me wince. Doing it again I would get a dualie AND still put air springs. GVW for my truck is a little over 11,000lb. Trick (diesel) weighs 6600 so I am just flirting with the edge with a fully loaded camper (I only fill the fresh water tank 1/3. That being said we took it across the country last summer. 8800 miles round trip without a problem.
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