The pulley of aluminum alloy sliding door is very wrinkled.

The most direct way is to find a property, which will contact the door and window factory to repair it for you. Generally, the door and window factory will provide after-sales service for the door and window hardware association for about 10 years. If the property can't be solved, you can go to the market with wheels. Because yours is a door, you should choose two wheels when choosing. It is difficult to push the wheel because the wheel design is unreasonable. A good design will design the wheels at an inclined angle according to the outline.