Adjustment of V-type Brake for Variable Speed Bicycle

First of all, look at whether the rim has been scooped up and whether the brake pads have been scraped by swinging from side to side.

If there is nothing wrong with the ring, there is a cross screw on the brake arm. Tighten the screws that always scrape into the ring. Twist the brake arm away from the brake ring, but loosen the screw on the other side before tightening.

If you are confused, go to the place where you bought the car and adjust it.