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Bifold Door Roller Replacement These rollers are suitable for bifold doors. They are made from stainless steel, and are resistant to wear and breakage for long-term use. They are sturdy enough to support your doors' weight and are easy-to-install. This top nylon roller guide was designed to be used in bi-fold doors weighing up to 30 pounds. It fits aluminum profiles from System S1000. How do you identify a broken roller on a bifold door Bifold doors are ideal for saving space in closet