A sliding door roller is a component used in sliding door systems to facilitate smooth and effortless door movement. It is typically installed at the bottom of the sliding door and helps distribute the weight of the door while allowing it to glide along a track. The roller consists of a wheel or set of wheels that rotate on an axle, which is attached to a bracket or housing. The bracket is then mounted to the bottom of the door.

Sliding door rollers are designed to withstand the weight of the door and provide stability, ensuring that the door moves smoothly and easily along the track. They are commonly made of durable materials such as steel or nylon, which offer strength and resistance to wear and tear.