How do I stop my disc brakes from squeaking?

  • What To Do To Get The Squeal Out
    • Disc brakes are, unfortunately known for being a squeaking nuisance, and it is sadly inevitable.  However, they have incredible stopping power and don't lose power in wet conditions like caliper brakes, which is why it's worth the hassle.  You can get your disc brakes to stop squeaking, but it will always return and need to be maintained. There are a tons of websites out there offering advice and help on how to maintain disc brakes for this reason.
    • Here at HQ, we use a special paste, called Squeal Out. We highly recommend having a product like this around.  Sometimes cleaning the brakes pads/rotors is not sufficient.  You only need the 3oz container, as it goes an extremely long way. We suggest that you please read the instructions to have the best results.  It may take a few applications to be fully successful.
  • Why Disc Brakes Howl
    • As the brakes go through the break-in period, they don't begin to stop with authority until some of the brake pad material is deposited on the rotor as the two components bed together. If the pad cuts through this layer or the layer is laid down irregularly by an improper break-in interval, the pad jumps a tiny bit as it hits a damaged area, digs in, jumps a bit and then digs in again a short distance beyond. The sequence creates an oscillation which continues onward, creating a microscopic series of waves around the circular braking track. Once the pattern is created, the rotor essentially becomes a steel recording disc that is programmed to squeal - and it can't be erased simply by switching to new pads. Brake squeal is most commonly caused by a weak initial break-in period, with the introduction of impurities like chain lube or chemical bike cleaners to the braking surfaces as a close second. 
  • Arrest the Squeal Before it Begins
    • Break in your disc brakes with a series of very firm stops from a reasonably good speed before you get out on the road. This properly deposits the pad material on the braking surface of the rotors. Typically, most riders drag their brakes lightly around every corner, as well as down easy descents. Lightly dragging a new set of brakes is a perfect recipe to create brake howl. 
    • Finally, oil your chain by the drop, not with a spray can and save yourself the hassle of cleaning or replacing your noisy rear brake components. Oil on the outside of your links does nothing good for the chain or the bike. Work the lube into the chain slowly and then wipe is squeaky clean before you ride. If you use an aerosol bike polish, then you are guaranteed to get some of the spray on the rotors. Wipe them with automotive brake cleaner on a fresh towel before you spin the wheels.
    • Disc Brake Info gathered from this website: PinkBike.