Converting a rim brake to a disc brake on a road bike is possible, but it can be a complex and involved process. It typically requires several modifications and components to be changed or added to the bike.
Here are some general steps and considerations involved in converting a rim brake road bike to a disc brake:
Frame and Fork Compatibility: Ensure that your bike frame and fork are compatible with disc brakes. Disc brake mounts are usually different from rim brake mounts and require specific mounting points on the frame and fork.
Disc Brake Mounts: If your frame and fork do not have disc brake mounts, you may need to use an adapter or replace them with ones that support disc brakes. This can involve welding or brazing new mounts or purchasing a new frame and fork designed for disc brakes.
Wheel Compatibility: Disc brakes require specific wheel hubs that have mounts for the disc rotor. If your current wheels do not have disc-compatible hubs, you will need to replace them or rebuild the wheels with disc-compatible hubs.
Disc Brake Calipers: Install disc brake calipers onto the frame and fork. These calipers clamp onto the rotor to provide the braking force. Make sure the calipers you choose are compatible with your bike's frame and fork.
Brake Levers: Rim brake levers are not compatible with disc brakes since they have a different cable pull ratio. You will need to replace your existing brake levers with ones specifically designed for use with disc brakes. These levers will have the correct cable pull ratio for the disc brake calipers.
Brake Rotors: Install the appropriate disc brake rotors onto your new wheel hubs. Ensure that the rotor size matches the specifications recommended by the manufacturer of your disc brake calipers.
Brake Lines: Disc brakes use hydraulic or mechanical brake lines to transmit the braking force. If you're converting from rim brakes, you will need to install new brake lines and connect them to your disc brake calipers.
Adjustments and Tuning: After the conversion, you'll need to adjust and fine-tune the disc brake system. This includes setting the rotor alignment, caliper position, and ensuring proper brake pad clearance.
It's worth noting that converting a rim brake road bike to a disc brake system can be a significant undertaking, and it may require advanced mechanical skills and specialized tools. If you're not confident in your abilities, it's recommended to consult a professional bike mechanic to ensure the conversion is done safely and correctly.