I show the steps to repair the squeal on a bicycle disc brake. The most common cause of screeching disc brakes is dirty, contaminated rotors or pads. Usually cleaning them will solve the problem. But if the pads are contaminated with oil, then the pads will need to be replaced.

I often get asked what can be used instead of alcohol. I do not know. Isopropyl alcohol is the most thing to use to clean bike disc brakes. There are some specialized bike disc brake cleaners such as Finish Line Bicycle Disc Brake Cleaner. https://www.amazon.com/exec/obidos/AS...
Anything else, may or may not work. Anything else, may or may not ruin your brakes. Do not use automotive brake cleaner. It may ruin your brakes.

▶ SUBSCRIBE & HIT THE 🔔 http://bit.ly/SubRJTheBikeGuy

👍 And please give my video a thumbs up 👍

▶FACEBOOK.com/RJTheBikeGuy
  / rjthebikeguy  

▶TOOLS
http://www.rjthebikeguy.com/tools

▶SHIRTS
http://bit.ly/RJBikeGuyShirts

▶WEBPAGE
http://www.RJTheBikeGuy.com