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My disc brake squeal cure

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My disc brake squeal cure

Old 11-20-18, 07:40 AM
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Lazyass
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My disc brake squeal cure

The front RS505's on my road bike started squealing at low speeds, like just before I would come to a stop. So I decided to fix it before they got worse. Did the pads-in-the-oven deal and cleaned the rotors with rubbing alcohol. They were instantly 100x worse, they would blow your eardrums as soon as the pads touched. The bike was unrideable like that. So I sanded the pads and the rotor with my dremel. No change. I cleaned the rotor with brake cleaner. No change.

Now at my wits end, I wiped the rotor with a soapy rag using Dawn dish soap (Walmart brand actually), I didn't even remove the wheel to do it. Then I got another rag with just water to wipe the soap off then dried it. Instantly fixed. For three rides now it's been 100% silent. I don't know if it was just using dish soap or a combination of everything I did but that was my fix.
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Old 11-20-18, 08:49 AM
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Dawn dish soap (even Wally World variety) is magic.
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Old 11-20-18, 08:54 AM
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could you to come back here and update this thread when the noise comes back?
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Old 11-20-18, 09:38 AM
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I have BB7's on one of my bikes and have tried everything to keep them from squeaking. Clean rotors and new pads works for a little while, but the squeaking always comes back. I've given up.
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Old 11-20-18, 09:53 AM
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Dawn dish soap will be better at removing oily contaminants than isopropanol.
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Old 11-20-18, 09:54 AM
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Pads in the oven.... What?
Sanding with a power tool.....Huh?
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Old 11-20-18, 10:09 AM
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Bacon grease is said to work miracles.
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Old 11-20-18, 11:05 AM
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Originally Posted by AnkleWork View Post
Bacon grease is said to work miracles.
That really depends on your definition of 'miracles'
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Old 11-20-18, 01:02 PM
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My BB7 were quieter with Kool Stop Organic compound pads.
replacing stock Avid..
but the braking it self is better being replaced by TRP Hy Rd.

Front chirps when disc is damp, not when it's dry..

with stock TRP pads..
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Old 11-20-18, 01:22 PM
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I cured squealing discs by replacing the bike with a bike using cantilevers. Instant relief and fine stopping power to boot.
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Old 11-20-18, 01:25 PM
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Originally Posted by AnkleWork View Post
Bacon grease is said to work miracles.
WD40 works great too! After all, it's advertised "If it sticks or Squeaks!".

My dumba** brother in law actually sprayed his car calipers with it to clean them. It only took standing on the brake pedal a few times to clear it off.
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Old 11-20-18, 01:41 PM
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Originally Posted by Rootman View Post
WD40 works great too! After all, it's advertised "If it sticks or Squeaks!".

My dumba** brother in law actually sprayed his car calipers with it to clean them. It only took standing on the brake pedal a few times to clear it off.
Cars are a rather different disk brake situation then bike are. To the above bolded commit- cars generate far more heat (to the point of boiling fluids and turning disks to red hot). Car disk pads are always in contact with the disk (as in they rub all the time. gosh that's so wrong) So heat in the disk is transferred into the pad extremely well and at a level of potential heat that any contaminates in the pads will get boiled off soon enough. Andy
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Old 11-20-18, 02:10 PM
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Originally Posted by trailangel View Post
Pads in the oven.... What?
Sanding with a power tool.....Huh?
Yep. You learn something new everyday.
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Old 11-20-18, 03:15 PM
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Not sure why people are so resistant to researching and adopting solutions developed in other applications.

Clue: disc roughness, pad "break-in", and pad damping.
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Old 11-20-18, 03:39 PM
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Im thinking I want to try this. My TRPs have very poor brake performance and they squeal like a pig whenever there is a bit of moisture on the road. Not impressed.
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Old 11-20-18, 03:48 PM
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Originally Posted by AnkleWork View Post
Not sure why people are so resistant to researching and adopting solutions developed in other applications.

Clue: disc roughness, pad "break-in", and pad damping.
Huh?
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