Bicycle Disc Brake Conversion Instructions

Bicycle disc brakes are the best type of off-road brakes available. They provide secure, measurable stopping power in a variety of conditions, including inclement weather. The brakes work when a metal disc is squeezed by two brake pads, much like the larger disc brakes found on cars. Luckily it is possible to convert to disc brakes if your bike is not equipped with them; however, this may require the use of adapters.

  1. Remove the Old Brakes

    • Begin by removing the old brakes. In many cases, these brakes will be some type of rim brake design, such as center-pull cantilever brakes or hydraulic brakes. Use an Allen wrench to remove the bolts holding the brake arms to the post mounts. Loosen and slide the cable out of the brake arm and then slide the cable out of the brake lever. In many instances, the brake lever can be reused for the disc brakes as well. Repeat this process for the other brake set so both brakes are removed from the bike.

    Install Adapters, If Applicable

    • Many bike frames and forks will already be equipped with disc brake mounts. These will be tabs on the edge of the rear part of the frame and on one fork leg for the calipers to mount securely.

      If your frame is not compatible, purchase an adapter from a local bike shop to mount the calipers to the frame. Also be sure that your wheels are disc compatible, as the actual disc will need to be mounted to the wheel hub to complete the installation. If your wheels aren't compatible with disc brakes, purchase a new set of disc-compatible rims.

    Install the New Brakes

    • Install the new disc brakes on the bike. Screw each caliper into the frame and the tabs on the fork posts. Run the cable or brake line up to the brake lever and mount the discs to the wheels using the Allen wrenches and provided hardware. Slide each wheel into the wheel slots and tighten the tabs down. Make sure that as you spin the wheel, the disc spins freely between the brake pads. If it does not or if they rub, use an Allen wrench to tighten or loosen the adjustment screw as needed.