I have Firestone airbags and they have improved pretty much all aspects of my truck's ride on my 2006 F250 LB. I used to deflate my Michelin tires all around to 55 t0 60 mph from the max of 65 in front and 75 in the rear to soften my ride when just driving around. I only deflate the airbags to about 10 lbs when not towing and that softened ride a bit. I no longer change the psi for the tires any more since I've lost 3 of them to tread separation (factory replacement warranty). So now I keep the fronts at 65psi, rears at 75, never deflate but lower the airbags to about 10psi. In my case, the bags have been great.
Do you have a short bed truck? Would that make a difference of more bounce? What is the psi in your tires all around? What are the tires? I had bad luck with Bridgestones bouncing me around, converting to Michelin or Goodyear tires helped. Maybe these make a difference. Also, aren't the later models much higher rated? Maybe things also got stiffened up because of that.
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