Since there is a water film between the brake pads/shoes and the brake disc/drum after wading, the friction is reduced, which will affect the braking effect, and the water in the brake drum is not easy to escape. To
For disc brakes, the impact of this kind of water on the braking effect will be lower, because the contact area of the brake friction lining of the disc brake is small, and it is exposed to the outside, and no water droplets are retained. Due to the centrifugal force when the wheel rotates, the water droplets on the brake discs will quickly dissipate, and the remaining water layer will be removed as long as the brake is slammed for a few feet after wading. To
But for drum brakes, after wading, you must step on the brake while walking, that is, step on the accelerator while stepping on the brake. After several consecutive times, the water between the brake shoe and the brake drum can be evaporated. In turn, the braking effect is restored.