I also have the air suspension and run at 80 PSI. The "book" listed the pressure as 5 PSI per thousand pounds on the axles minimum. Since I have a bit over 14k on the axles as per scale results I set it at 80. I check it (and the tires) every single travel day. As long as it is within a couple PSI I let it go. So far so good and that is on more than 8 years of towing now.
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Mike Nancy and the fuzzies
Fulltiming since June 2004
Volvo 660 MH tow vehicle
2005 MS 38RL
2007 Saturn Ion "toad"
2010 Gold Wing "piggyback"
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