Most houses in Van Alstyne went up around 2005, which puts them squarely in the tract-home boom years. Builders on jobs like that spec the cheapest roller that passes inspection - stamped steel stems with a solid plastic wheel, no bearing, pressed into a galvanized track. That roller is rated for maybe 10,000 open-close cycles. Run the math on a door that's opened twice a day since 2005 and you're past that number, sometimes well past it. The plastic doesn't shatter outright; it flat-spots, then cracks along the hub, then starts chewing a groove into the track itself. You'll hear it before you see it: a grinding or clicking that gets louder as the door nears the top or bottom of travel, worse on cold mornings when the plastic stiffens up. This area sits in a cold-moderate climate band, so that stiffening is a real seasonal pattern here, not a one-off. A roller that's merely noisy is annoying. A roller that's cracked and still running is a track-jump waiting to happen, usually right when a cable or spring is already under load. The two faults compound - a worn roller puts side-load on hardware that was never designed to take it.