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DIY Bifold Door Roller Replacement The bifold door roller is a common point of failure in internal doors with light weights. A simple DIY solution 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 that is included for easy installation. They also have load bearing and designed to operate smoothly. Nylon Wheel Nylon is a thermoplastic product with outstand