Why do my bike disc brakes have no power?

- Oil or grease on the brake pads or rotor can reduce braking power. Clean both surfaces with isopropyl alcohol and avoid touching them with your fingers.

2. Brake pads are worn out:

- Worn-out brake pads have reduced friction material, resulting in decreased stopping power. Check the thickness of your brake pads and replace them if necessary.

3. Rotors are warped:

- Warped rotors can cause the pads to vibrate and lose contact with the rotor, reducing braking power. Check for any visible warping and replace the rotor if necessary.

4. Brake fluid:

- Low brake fluid or air bubbles in the brake lines can significantly reduce braking power. Check the brake fluid level and bleed the brakes to eliminate air bubbles.

5. Caliper alignment:

- Improper caliper alignment can prevent the brake pads from contacting the rotor evenly, resulting in reduced braking power. Check and adjust the caliper alignment according to the manufacturer's specifications.

6. Loose bolts:

- Check the bolts that hold the brake caliper and rotor in place. Loose bolts can cause the brakes to move, reducing braking power.

7. Incorrectly sized rotors or brake pads:

- Check that the rotors and brake pads are the correct size for your bike model and brake system. Incorrect sizing can affect braking performance.

8. Worn-out brake hoses:

- Over time, brake hoses can deteriorate, especially if exposed to extreme weather conditions. Worn hoses can expand, leading to reduced braking power. Replace old or damaged brake hoses.