As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
GOODYEAR FLIGHT CUSTOM II 6PLY. THIS IS THE SECOND TIRE. I HAVE CHANGED DUE TO THIS CONDITION I DID NOT SAVE THE FIRST TIRE. WHEN I CHANGED IT LAST AND THOUGHT THE BLISTER WAS FROM AGE. THIS IS THE SECOND TIRE, LOOKS LIKE MAYBE THERE IS A WEAK SPOT OR DEFECT.