With a median build year around 1997, a lot of Corinth's garage doors are somewhere past the twenty-year mark on their original rollers, and steel rollers on galvanized track have a shelf life measured in wear cycles, not years alone. A door that opens and closes four or five times a day, which is normal for an 8,143-household stretch where most of the housing is single-family with attached garages, puts a steel roller through tens of thousands of cycles by year twenty. The wheel flattens, the bearing dries out, and the door starts making the grinding sound that brings most of these calls in.
Heat plays a smaller role than people expect - this area sits in a moderate heat band, not the kind of extreme swing that cracks nylon rollers outright - so the failure here is mechanical wear on old steel, not weather damage. That's a useful distinction, because it means a roller swap on its own usually solves the problem, without needing a new opener or spring set at the same time.