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DIY Bifold Door Roller Replacement The bifold door roller is a common problem in internal doors with light weights. The issue is easily fixed by using an easy DIY solution. The rollers are made from stainless steel and are resistant to breaking. They are simple to install using the included hardware. They also have load bearing and designed for smooth operation. Nylon Wheel Nylon is a thermoplastic substance with outstanding mechanical properties. It is able to wit