Suspect: Mr Donut Charge: Tire Abuse Verdict: Guilty or Not Guilty?

[mrdonut12]

I had tire pressure problems from the day I got my bird, a year and
a half ago. I was constantly airing up the tires. They'd lose a few
pounds a day.
The fronts were new and no problem. The rears were Michelin
11R 22.5 LRH and lost air. I went to a truck tire place last Fall and
had all the valve stems replaced and that fixed the leaks. I rarely
had to add air after that.
Took a trip a month ago and aired tires before I left.
Went 1400 miles round trip. Tires were fine. I always check
tire temp when I stop. No problems.
Left for a 170 mile trip Friday, didn't check tires before I
left. Mistake #1, won't make that one again. ;o)
23 miles into the trip, wife wants front heater turned on. I
have to crawl under front to open valve. Notice right rear inner
dual appears to be flat. It is!
Air it up from on-board compressor, have new hose and tire guage.
It was flat. Zero pressure. Push in sidewall easily with hand. Flat.
Checked it with soapy water. No leaks found. Held air fine
for the next 2 days.
Cause for low pressure unknown, no cause can be found, unless
someone let the air out, in which case they laid there for nearly a
half an hour, pushing in the valve stem.
The question is, these are 4 years old, due to be replaced next
Fall. Have I damaged the tires with my actions? I'd rather wait
until Fall to buy tires. I need to drive to Rhode Island in June.
So, Guilty or Not Guilty?

George Witt
81 FC 35 WLSB
Lincoln, Nebraska--Huskers