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DIY Bifold Door Roller Replacement The bifold door roller is a common issue with internal light-weight folding doors. The issue is easily fixed by using an easy DIY solution. Bifold door rollers made of stainless steel are resistant to breakage for long-term use. They can be easily installed using the hardware included for straightforward installation. They also have load bearing and designed for smooth operation. Nylon Wheel Nylon is a Thermoplastic material with excellent mechanica