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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 a long time. These rollers are strong enough to support your doors' weight and are easy-to-install. This nylon roller guide for the top is designed to replace bi-fold door panels up to 30 pounds. It fits aluminum profiles from System S1000. How do you identify broken rollers on the bifold door Bifold doors can be an excellent solution to save space