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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 can be found to fix the issue. The rollers are made from stainless steel and are resistant to breakage. They are easy to install with the included hardware. They also have load bearing and designed to operate smoothly. Nylon Wheel Nylon is a thermoplastic material with outstanding mechanical properties. It can withstand heavy loads and even some