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Bifold Door Roller Replacement These rollers are suitable for bifold doors. They are made from stainless steel, and they resist wear and breakage for long-term usage. They have a large capacity for carrying the weight of your doors, and are easy to set up. This nylon roller guide for the top is designed to replace bi-fold doors panels that weigh up to 30 pounds. It fits System S1000 aluminum profiles. How do you recognize a broken roller on the bifold door Bifold doors are a fantastic storage solution