Thanks for the feedback so far. I have tested them several times and they inflate and hold 50psi just fine, no leaks. They are snug in the coils, so I'm relatively confident the diameter is correct. With that said, there is about 3/8" of vertical free play in them with the truck unloaded at ride height?
Several rounds of testing with various weights, and empty, have confirmed there is never any gain in height when adding air pressure. To that point, as I mentioned before, the truck will sag about 1/2" with 140lbs of water softener salt in the bed with the bags at 50spi??