The honest reason rollers fail on a 2012-median-age house isn't rust or rot, it's cycle count. These are newer doors on newer openers, often used two or three times a day for over a decade, and the stock rollers that came with a factory-installed door are rarely top-tier. They're built to last the warranty period, not the life of the house. Compare that to the broader stretch of this service area, where houses from the late 1950s through the 1990s often still have original steel rollers on side-mounted torsion hardware that nobody made to fail fast - different problem, different fix. In Nolensville specifically, it's wear, not neglect, and that's actually the easier repair.