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Bifold Door Roller Replacement These rollers can be used for bifold doors. They are made of stainless steel, and they resist wear and breakage for a long time. They have a strong load-bearing capacity to support the door's weight, 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 is compatible with System S1000 aluminum profiles. How do you recognize the broken roller on the bifold door Bifold doors are an excellent storage