Stonegate's housing stock runs newer than a lot of what we cover - median year built around 1997, well past the 1980s median across the wider service area. That means original builder-grade rollers here are pushing toward 30 years old, right at the point where the plastic tire on a steel-stem roller gets brittle and starts shedding chips inside the track. In a severe cold climate, that brittleness accelerates: the tire that was fine at 60 degrees cracks at 10 below, and you hear it as a grinding or a hard clunk every time the roller crosses a track seam. Some owners notice the door running rough only on the coldest mornings and assume it's the opener. It's usually not the opener. It's a roller that's lost its round shape and is now knocking its way through the track instead of rolling through it, and that knock only gets louder.