How to Properly Replace Brake Pads for Carbon Rims

Carbon rim wheels offer exceptional performance benefits such as lightweight construction and superior aerodynamics. However, they require special care when it comes to brake maintenance. Unlike aluminum rims, carbon rims need brake pads designed specifically for their unique surface and heat characteristics. Replacing brake pads correctly is essential for safety, optimal stopping power, and preserving the lifespan of your carbon rims.

Why Use Carbon-Specific Brake Pads?

Standard brake pads designed for aluminum rims can damage carbon surfaces and reduce braking effectiveness. Carbon-specific pads are formulated to:

Provide reliable stopping power without glazing the rim

Manage heat buildup to prevent rim damage

Minimize wear on the rim surface

Using the right pads ensures consistent performance and extends the life of your wheels.

Tools and Materials You’ll Need

Carbon-specific brake pads compatible with your brake calipers

Allen wrenches or appropriate tools for your brake system

Isopropyl alcohol and a clean rag

Optional: Sandpaper or brake pad cleaning tool

Step-by-Step Guide to Replacing Carbon Rim Brake Pads

1. Remove the Wheel
Start by taking off the wheel to give yourself clear access to the brake pads.

2. Loosen and Remove Old Pads
Use the appropriate tool to loosen the mounting bolt or clip holding the brake pads. Slide out the worn pads carefully.

3. Clean the Rim Surface
Before installing new pads, clean the braking surface on the carbon rim using isopropyl alcohol and a clean rag to remove residue and oils.

4. Prepare the New Brake Pads
If new pads have a protective coating, remove it. Check the pad’s shape and size to ensure compatibility.

5. Install the New Pads
Insert the new carbon-specific pads into the brake caliper holders. Make sure they align properly with the rim braking surface—not touching the tire or hanging off the edge.

6. Adjust Pad Position and Toe-In
Brake pads should contact the rim slightly before the trailing edge to reduce squealing (called “toe-in”). Adjust the pad angle by loosening the mounting bolt, aligning the pad, then retightening securely.

7. Test Brake Function
Reinstall the wheel and spin it. Squeeze the brake lever several times to check pad contact and braking feel. Make any fine adjustments to pad alignment or cable tension as needed.

Tips for Optimal Carbon Brake Pad Performance

Break-In Period: New pads and rims need a bedding-in process—apply moderate brake pressure repeatedly to condition the surfaces.

Regular Inspection: Check pads frequently for wear, contamination, or glazing.

Avoid Contamination: Keep pads and rims free from oil, grease, or lubricants.

Replace Pads Promptly: Worn pads can reduce braking power and damage rims.

When to Replace Brake Pads

Replace your carbon-specific brake pads when:

You notice a significant decrease in braking power

Pads appear visibly worn below the manufacturer’s recommended thickness

You hear persistent squealing or grinding noises

The braking surface becomes glazed or hardened

Final Thoughts

Properly replacing brake pads on carbon rims is a simple but crucial maintenance task. Using the right pads and installing them with care ensures safe, quiet, and effective braking—maximizing the benefits of your carbon wheels and prolonging their service life.