Bicycles can stop slowly and smoothly only when the brake system is functioning properly. However, there are several reasons why a bicycle may not stop as expected. One of the main reasons is the lack of proper contact between the brake pads and the brake disk. When the pads and disks are not properly coated with a release agent or have not been properly installed, they can act like two smooth "mirrors" and cause the brakes to slip or not work properly.

New bicycles typically have unexposed brake pads and disks, so the contact between them is not optimal. The surface structures of the pads and disks are not smooth, which can affect the braking effect. After a period of use, the pads and disks will become smooth, and the braking effect will improve.

To solve this problem, you can try pressing the brake lever harder or pressing it on both sides to speed up the磨合 process and improve the feel and performance of the brake. If your bicycle's brake is not working properly, the first step is to check whether there are any issues with the small components inside the brake system. If the pads have worn out, you may need to bring your bike to a bicycle repair shop to have them replaced. Generally, a new pad costs only a few dollars.

Another possible reason for a bicycle's brake failure is a stretched brake wire. If the brake wire is stretched too much, you can use a tool to adjust it manually. Just adjust the connection between the brake lever and the brake line slightly to fix the problem.