The gods were smiling on me UPDATE
I took the tire to Discount in Cottonwood. The problem was a separation (see pics). Now the second part of the story. I take my paperwork to the front desk to show them the road hazar...
Forum Discussion
If you don't have all metal valve stems, then the flat could be from the weight of the TPMS sensor cracking the rubber. I bought the TST 507 before my last long trip. Somewhere in Kansas on a Sunday the TPMS alerted me on a tire slowly losing air. Pulled into a gas station and found it was a cracked rubber valve stem near the rim. Luckily I was 10 minutes from a Costco. For a whopping $11.00 they replaced all 4 on the Burb with longer "metal" stems. (They didn't have the short ones in metal) They worked fine until I got home several thousand miles later. Next day, one of the tires is flat. Yep, another cracked valve stem. The "metal" valve stems were rubber where it attaches to the rim. Only the stem part was metal. So with a little research I bought all metal valve stems for the truck and trailer. No worries now. Linky
