Need an advise for my squeaking brakes :(

[Brandon P]

Get some alcohol swobs from a pharmacy and run them over the discs to clean them of any grease or grime - Always handy to keep in your toolbox.

[BenReaper]

Funny enough I had a new entry level bike with Tekro brakes and they stopped dead without a sqeek.after that got a second hand bike with XT brakes and they screamed like pigs,sorted that out with a new pads,no problems whatsoever anymore.

[Soufflé]

Few things which will fix the pig:

True rotors

Deglaze rotors and pads

Clean with isopropyl alcohol

Ensure calipers fitted to "clean" frame (no paint in between)

Apply thin (very thin) layer of copper grease between pad and plunger

Do the bedding (run-in) procedure

If still screaming, strip service calipers and bleed system

Edited July 10, 2014 by veonix

[Johan Bornman]

Take off the wheel, take out the pads. Get a can of Q20 with a long thin nozzle. Spray oil into the opening around the brake pistons. That will allow the pistons to retract and release contact with the brake pads.

You may want to think about this a bit. Q20 will make the seals swell and become gooey and lead to sticky pistons. The Q20 trick will work for a short while and then disaster, if enough gets in there. Problem is, Q20 is not pure silicone but a compound that also contains chlorine. A chlorine-free lubricant like Q8 (IIRC this is chrorine-free) made by the same company, will work. However, the recommended method is to use the same fluid as the rest of the system i.e. mineral oil or brake fluid. As an aside, I was taught how this seal-swelling trick can help you if you're in a fix. By applying a little bit of Q20 to a wrist-watch gasket when you've changed the battery and don't have a new gasket, it swells and goes soft, and then seals again.

[River Rat]

 

You may want to think about this a bit. Q20 will make the seals swell and become gooey and lead to sticky pistons. The Q20 trick will work for a short while and then disaster, if enough gets in there. Problem is, Q20 is not pure silicone but a compound that also contains chlorine. A chlorine-free lubricant like Q8 (IIRC this is chrorine-free) made by the same company, will work. However, the recommended method is to use the same fluid as the rest of the system i.e. mineral oil or brake fluid. As an aside, I was taught how this seal-swelling trick can help you if you're in a fix. By applying a little bit of Q20 to a wrist-watch gasket when you've changed the battery and don't have a new gasket, it swells and goes soft, and then seals again.

And that's how we learn, thanks.