For a 1995-era build like most of what's standing in Ramsey, we're usually dealing with factory steel track, stamped-steel or nylon rollers, and galvanized lift cables sized for a lighter residential door - parts that are common, not special-order. We carry replacement track sections, rollers, and cable on the truck for that generation of door, along with the hinges and end bearings that usually go bad around the same time a roller does.
Minnesota winters put real stress on this hardware - F3 cold climate means repeated freeze-thaw cycling on any grease or lubricant left on track and rollers, which stiffens movement and accelerates wear on anything already marginal. If a roller's been grinding all winter, it's often not alone; we check the matching roller on the opposite track too, since they tend to wear out close together on doors from the same era.