That's right, I remember another post of yours where you talked a bit about your group you're a part of, sounds interesting. I was just out at Calico 2 weeks ago, lots of mines to explore out there.
I haven't, but I'll add this to the list of things to rule out. When I'm wheeling I air down with a rapid tire deflator that has a gauge but I also have a spare gauge that I could compare results with.
I think I'm going to try them at 12 psi next time and see how that goes. If this problem continues I'll have to think about trying to try and clean them up the rim.
Was a fun day otherwise!
Is this something that I could do myself now that the tires are already mounted? Could I completely deflate the tire on the rim and clean up the mounting surface and get some tire lube?