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Bifold Door Roller Replacement These rollers are ideal for bifold doors. They are made from stainless steel, and they resist breaking and wear for long-term usage. They have a high load-bearing capacity to support the weight of your doors, and are easy to set up. This nylon roller guide for the top was designed to replace bifold doors panels that weigh up to 30 pounds. It can be used with aluminum profiles of System S1000. How to identify a damaged bifold door roller Bifold doors are a great storage