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Bifold Door Roller Replacement These rollers are ideal for bifold doors. They are made from stainless steel, and are resistant to wear and breakage for long-term use. They have a high load-bearing capacity to support the weight of your doors and are simple to put in. This top nylon roller guide was designed to be used in bi-fold doors weighing up to 30 pounds. It can be used with System S1000 aluminum profiles. How do you recognize the broken bifold door roller Bifold doors