I'm wondering what kind of air pressure y'all run in the rear of the tour bikes like mine (FLHTCi) if you're carrying a passenger of (I'm gonna be kind here & say 150lbs.)? Do you still get a good ride with THAT air pressure?
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I have front and rear air suspension on my bike.
I've experimented with the pressure over the last 20 years, loaded unloaded and everything in between.
THE BEST RIDE - loaded or not - 10psi front and back.

Lower pressure loaded the bike bottoms out. Higher pressure not loaded the bike still rides nice and behaves well in the corners. I can go up to 15 in the back but it gets too sharp on the bumps/seems like the suspension is too hard.

I get a high speed wobble when I don't have enough air in the suspension. I've gone with 8 in the front 10 in the back but the bike handles much better when the pressure matches.

I have no idea why I didn't receive notification of your answer....but I'll apologize for being so long getting back with you. WOW on the 10 & 15 lbs. My manual says a maximum of 50 lbs. so I automatically figured with both my wife AND I on the bike I probably should keep it at the max. I guess I might be overdoing it, huh !!!!! Sponginess & whish-whashiness will indeed come about cornering with low air pressure. Could even be considered unsafe & could get ya in trouble.

Thanks again for your reply.

50 PSI - wow!!
My bike max's out at 15 psi back and 10 front. Huge difference. I guess HD stands for Heavy Duty...

The dealership used to sell a tiny pump for my suspension - now you can use a compressor.
At 50 psi - how does the bike ride - hard on bumps go lower - if it rides nice and you like it keep it where you have it.