This matters more here than it would somewhere with older houses, because Dayton's homes are young enough that most owners haven't had a hardware failure yet and assume the whole door is going when it's really one part. The service area sits in a cold climate band with real winter severity, and that cold is hard on nylon rollers specifically - the plastic gets brittle below a certain temperature and a roller that flexed fine in August can crack on a January morning. Steel rollers don't crack, but they carry more noise into the house, which matters if the garage sits under a bedroom, common in newer construction like Dayton's. At roughly 3,034 households, Dayton isn't a huge piece of our coverage map, but it's a fairly uniform one - built in a tight window, so a lot of these doors are approaching roller failure at close to the same time.