Regularly adjusting your bicycle brakes will help them perform better and ensure your riding safety. In the brake system of your bicycle, the two main things you need to adjust are the brake pads and the brake cables. The edges of worn brake pads that are too low or too high may be a safety hazard. A brake cable that is too loose will cause the brake to fail. However, you can easily solve these problems with some simple tools!
1. Before you make any adjustments, check your brake pads. The brake pad is a shim that gets stuck on the front tire of your bicycle when you pull the brake lever. If the brake pads wear more than the line marked "wear line", you need to replace them before adjusting the brakes.
2. Press the brake lever and see where the pad hits the rim. The two brake pads should touch the edge of the front tire at the same time. They should hit the edge of the center, with the same amount of space above and below the pad. If the washers are too high or too low, they may touch the rubber part of the tire or the spokes on the bicycle.
3. Use a wrench to loosen the bolts and fix the brake pads in place. Turn the wrench counterclockwise to loosen the bolt. Do not loosen the bolts on the road, otherwise the brake pads will come out of the brake disc.
4. Move the brake pad up or down to the brake pad seat. Once the bolts are loosened, they can easily move up and down. If the mats are too low at the edges, move them until they are in the center. If the mats are too high on the edges, move them down until they are in the center.
5. Retighten the brake pad bolts with a wrench. Continue to turn the wrench clockwise until the bolts are fully tightened. Check to ensure the center position of the brake disc. Adjust it if necessary.
6. Test the tightness of the cable by pulling each brake lever. When you pull the brake levers, they should be 1.5 inches (3.8 cm) away from the grip of the handle. If the lever hits the handlebar when pulling the handle, the brake cable is too loose.
7. Loosen the barrel adjuster to make a slight brake cable adjustment. If your brake cable is only slightly loose, loosening the barrel adjuster may solve the problem. The barrel adjuster is located where the brake cable connects to the brake lever
8. Unscrew the bolt that fastens the brake cable on the caliper. The caliper is the main frame of the brake, and the brake pad is connected to it. The brake cable is a thin cable extending from the caliper. Locate the bolt that supports the brake cable. Use the Allen wrench to rotate counterclockwise several times until the bolts are slightly loosened.
9. Pull the brake cable outward to tighten it. Now that the bolts are loose, you will have no problem pulling the cable. Once you pull it tight, hold it down with your fingers. When you pull the cable, the brake pads should be fastened to the edge of the front tire. You want them to be tight enough that there will be some resistance when you turn the tires, but not so tight that the tires won’t turn at all
10. Tighten the bolts that fasten the brake cables on the calipers. Using the Allen wrench, turn it clockwise 2-3 times until it stops turning. Once the bolt is tightened, the cable should be fixed in place.
11. Tighten the adjuster on the handlebar. Turn the adjuster you loosened in the first clockwise direction several times until it is fully tightened. Tightening the adjuster will release the brake pads, which are clamped to the front tires. Once the adjuster is tightened, your brake cables should all be set!