A caveat to the Good Sam "junk mail"
If it had not been for repeated mailings to join the Good Sam ERS and finally doing it last year, I'd probably still be underneath my truck in Goshen trying to get the inner dually off the axle. Seems just before the dinner on Saturday, I decided to check my tires, and found the inner dually was deflated. Got out my membership card, called the number and discussed the problem with a charming lady named Amanda. She had a tow truck to me in about 30 minutes and reminded me that everything was covered, I did not have to pay anything. After watching my neighbor struggle getting his spare off his truck (a flat just minutes before finding mine), I decided to make sure I could get mine down before the tow truck arrived. No problem. The inner dually fits the axle rather snugly, and the repairman had to beat it off from under the truck with a mallet. And those tires have been rotated more than once, too. The fellow could not find a leak after reinflating the tire, but suspected the plastic valve caps I had was the problem. So he gave me enough metal ones to replace all of them. Just to be sure, we put the spare on and put the removed tire in the spare position. And I made it to the dinner only a few minutes late.
Here it is, two days later back at Camp Gotchurwallet, and the tire (now spare) is still fully inflated, so maybe it was the cap.