The solution to the sound of metal collisions that keeps making a cycling

1. When cycling, the sound of metal collisions is constantly made. When you stop the car, turn the chain yourself, which can be simulated. such as video 1

2. After careful observation, it is found that the cause should be caused by the shedding of the chain. as shown in Figure 2

3. Manually re-embed the chain on the runner first, then turn the chain to automatically embed it all on the runner.

4. Then the problem is solved. No more noise.

5. I found that it was still not completely solved, and finally decided to find a shop to repair bicycles. Finally, I found that the root of the problem came from the central shaft, and the bearings in the central shaft have been corroded. as shown in Figure 3

6. After replacing a central axle, the new central axle adopts the same technology as shared bicycles, which is different from the previous central axle technology. The previous central axle contains some steel balls. The problem is completely resolved. as shown in Figure 4