[william4269]

so heres my problem. my rear brake squeaks really loud. i have cleaned the pads and rotor. i even trieds a different caliper but yet it still squeaks. what else should i try?

edit: brakes are shimano m485. the rotor has been refaced, bedded in and the cleaned. the rotor looks like this http://www.eshop-gorgona.com/catalog/images/Disk%20SH%20Deore.jpg

 

[TCoop924]

What is your brake's make and model? I have heard that rotor design can also play a role in this (the physics of those cooling holes makes for an interesting side conversation). You could try switching the rotor out with a freshly cleaned (isopropyl alcohol only) one and see if that helps.

 

[dsb18292]

Give it to your dog. Dogs are the best de-squeakers in the universe

 

[Colonel Angus]

This sounds crazy, but it worked for me after I exhausted every other possible solution and cause in the known universe.

Get a real small file and file a little bevel on the leading edge of the vents in the rotors, on the outboard side only. Don't ask me why it works, but it has worked on 2 different bikes for me.

 

[TCoop924]

Get a real small file and file a little bevel on the leading edge of the vents in the rotors, on the outboard side only. Don't ask me why it works, but it has worked on 2 different bikes for me.

That's the "physics" part I was referring to earlier. Definitely heard of this working before.

Ha! There are papers on it...http://www.mscsoftware.com/support/library/conf/wuc96/10b_hert.pdf.

Looks like all you need is some beefy mathematical modeling software and you can fine tune your brakes to be silent

 

[william4269]

heres the other thing, it only squeaks on my xc bike. if i put it on my hard tail, it doesn't squeak.

 

[demo 9]

heres the other thing, it only squeaks on my xc bike. if i put it on my hard tail, it doesn't squeak.

frame resonance?

 

[william4269]

frame resonance?

i'm thinking that's what it is. anyway of stopping this?

 

[bohorec]

you can try with zip tie.

like this:

it worked on my xc bike.

 

[demo 9]

i'm thinking that's what it is. anyway of stopping this?

having a huge problem with it right now, cannot get my wheel to not fall off, even with lock tite, my next try is rubber everywhere

 

[w00dy]

Those brakes are known squealers.

Usually it's pad contamination that causes such noise. You can't just clean those. Clean the rotors again and pop in fresh pads. If all else fails, zip tie a piece of a grip to the rotor. I did that to a crappy old cable hayes once and it shut up forever.

 

[william4269]

Those brakes are known squealers.

Usually it's pad contamination that causes such noise. You can't just clean those. Clean the rotors again and pop in fresh pads. If all else fails, zip tie a piece of a grip to the rotor. I did that to a crappy old cable hayes once and it shut up forever.

its not just that brake though. I've tried 3 other brakes and still the same noise

 

[daisycutter]

the brake mount maybe off buy a bit. magura makes a facing tool.

 

[william4269]

the brake mount maybe off buy a bit. magura makes a facing tool.

its an easy fix because all post style brakes you can adjust by undoing the mount bolts that attach the caliper to the adaptor. then squeez brake lever a few times, then lock up the brake and tighten the bolts back up.

also tried the zip tie method and still squeaks. i haven't had anytime to go out and get a set of pads.