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  1. #1
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    Brakes squeeling

    I have hydrolic disc brakes on my 29r. I have not ridden it in a couple years and when I did it had very little use. I want to finally ride this bike (I should have before!) and when slowing down the brakes are very loud. What should I do? Is it just a little dust that will work itself out? Thanks!

  2. #2
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    Squealing, wobbling, and all varieties of noises have been around since bikes had brakes, the problem seem to have escalated in intensity and frequency since disc brakes become common. The etiology of the problem is hotly debated on the forums. A quick search will result in many many remedies to this problem. Here are a few I've tried, though they don't always work every time...

    1) adjust the calipers per the manufacturer's instructions
    2) clean the rotor and disc pads with automotive brake cleaner
    3) sand the rotor and disc pads with sand paper to remove glazing
    4) a product called "squeal out" has worked well for me in getting rid of the noise, but at the cost of temporary decrease in braking power
    Go on ahead, I'm gonna take a breather.

  3. #3
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    ^Those are some good suggestions. If your bike's been in storage for awhile, the pads can glaze over. I'm not sure what the technical term would be or what actually happens, but it seems to be the case that you can sand off the top layer and the squealing stops/brake power improves. I'd make sure your brakes are adjusted properly, clean the rotors, sand the pads and give them a try.
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  4. #4
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    I used rubbing alcohol on the discs and it cured the problem. Must have been excess dust and grime, THANKS FOR ALL OF THE REPLIES!

  5. #5
    DFMBA.org
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    Quote Originally Posted by joker357 View Post
    I used rubbing alcohol on the discs and it cured the problem. Must have been excess dust and grime, THANKS FOR ALL OF THE REPLIES!
    Good call. I clean my rotors after every ride with isopropyl alcohol and have not had and squealing issues.
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  6. #6
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    yep same here i clean my pads after a few rides never had them squeal

  7. #7
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    thats what i love about this forum i get the best information. I had the same problem with my brakes i read this thread and cleaned mine with alcohol also and presto no more squeel! thanks guys awsome!

  8. #8
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    Quote Originally Posted by CCMTB View Post
    Good call. I clean my rotors after every ride with isopropyl alcohol and have not had and squealing issues.
    Where do you buy this stuff?

  9. #9
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    Quote Originally Posted by Mark194 View Post
    Where do you buy this stuff?
    Any grocery store or pharmacy

  10. #10
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    Quote Originally Posted by Mark194 View Post
    Where do you buy this stuff?
    commonly called Rubbing Alcohol...it should say 'isopropyl' on the label

  11. #11
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    I periodically wipe down the rotors with alcohol too. sure does help.

    I just recently swapped out the pads on my BB7's with organic pads. Have about 75 miles on them now. Working great, no funky noises. I'm happy.

  12. #12
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    i had a brake squealing noise problem that went away now it sounds like water sloshing around when i brake anyone know what this could be ? ive seen something about water in the rim but i wasnt sure that was it.

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