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DIY Bifold Door Roller Replacement The bifold door roller is a typical issue with internal light-weight folding doors. A simple DIY fix is available to fix the issue. Bifold door rollers made of stainless steel are resistant to breakage for long-term use and are designed to be installed easily with the hardware included for straightforward installation. They also bear loads and designed to operate smoothly. Nylon Wheel Nylon is a thermoplastic product with excellent mechanic