Quote:
Originally Posted by Evil Eye
FWIW, air bags do not increase load carrying capacity, they simply help level out your ride and provide more dampening for your suspension. Due to the increased load, your suspension is compressed and allows significantly more rebound over bumps, etc and this helps eliminate some of that. 
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Correct me if I am wrong, but the ONLY thing that is different between the F250 and F450 is the suspension, and Axles.
If that is true, then increasing your suspension would increase capacity correct?