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DIY Bifold Door Roller Replacement The bifold door roller is a common issue with internal light-weight folding doors. A simple DIY fix is available to solve the problem. Bifold door rollers made of stainless steel resist breakage for long term use. They can be installed easily with the hardware included for straightforward installation. They are designed to support loads and operate with ease. Nylon Wheel Nylon is a thermoplastic substance with excellent mechanical properties. It is able to withstand heavy capacities f