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  1. #1
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    Screaming breaks

    Is it normal for new disc breaks to make noise i.e. scream? It's a bit embarrasing, is there any cure?

  2. #2
    My left shoulder hurts. tempest's Avatar
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    Quote Originally Posted by BadBreaks
    Is it normal for new disc breaks to make noise i.e. scream? It's a bit embarrasing, is there any cure?
    It normally takes a set of pads a few (10-20) hard stops to get to full power. You can glaze the brake pads if you push them too hard without proper burn-in (bedding) then you can get all sorts of nasty effects.

    You can lightly sand the surfaces of the pads with some fine grit sandpaper, but be aware that this may get abrasives from the sandpaper lodged in the pad's friction surfaces. Go as light as you can on them.

    Glazed brakes don't always screech, but the don't work terribly well and you've got to remove the pads to remove the glaze + clean the rotor with a solvent like isopropanol, denatured methanol, or a bike specific cleaning product such as Clean Streak - just make sure that you don't contaminate the rotor or pads with anything of any-sort.

    Automotive products should be avoided at all costs as their residue is designed to evaporate at auto brake operating temperatures. Bike discs don't get anywhere near hot enough, so they'll just gum up. I don't think that the 'disc brake quiet' compounds are applicable to bike brakes either, since they'd just contaminate the pads and attract contaminates into the calipers.

    The rotor may be loose on the hub as well. Don't spray anything into the calipers or face dire consequences if you're running a hydraulic system.
    GT Avalanche | Specialized P3

  3. #3
    Caustic Soccer Mom apclassic9's Avatar
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    basically, yes. It's normal. Some do it more than others, some stop quicker than others.
    As with mud, life, too, slides by.

  4. #4
    Banned. BugsInMyTeeth's Avatar
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    Oh the humanity....

  5. #5
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    My 2007 Juicy carbons make a lot of noise when I start out riding and if they are wet. After that, they settle down.

  6. #6
    Caustic Soccer Mom apclassic9's Avatar
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    Quote Originally Posted by mikejo
    After that, they settle down.
    SILENCE!! I SAY, SETTLE DOWN!!
    As with mud, life, too, slides by.

  7. #7
    It is what it is... Minesbroken's Avatar
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    stop torchering them
    sign here so we can do stuff to your stuff...

    myspace
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    my bike

  8. #8
    My left shoulder hurts. tempest's Avatar
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    Quote Originally Posted by apclassic9
    basically, yes. It's normal. Some do it more than others, some stop quicker than others.
    Comparatively eloquent. I am shamed.
    GT Avalanche | Specialized P3

  9. #9
    Mad Furyan Quick_Torch C5's Avatar
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    Quote Originally Posted by Minesbroken
    stop torchering them
    Give us a brake, he needs help with his skweeling breaks

    mine squeak every now and then, it's somewhat normal in disc "break" systems
    Why is going slower harder?

  10. #10
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    Thanks gentlemen!

    It's good to know me and my bike are normal.

  11. #11
    Old School Rad mtnbiker66's Avatar
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    I've heard that bad brakes lead to bad breaks.
    Like a circus monkey on a stolen Harley......

  12. #12
    Too Much Crazy
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    Breakin 2 - Electric Boogaloo

  13. #13
    Senior Member mlh122's Avatar
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    Quote Originally Posted by Minesbroken
    stop torchering them
    do you mean torturing? or is it something to do with torches?

  14. #14
    I drink your MILKSHAKE Raiyn's Avatar
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    Quote Originally Posted by tempest
    It normally takes a set of pads a few (10-20) hard stops to get to full power. You can glaze the brake pads if you push them too hard without proper burn-in (bedding) then you can get all sorts of nasty effects.

    You can lightly sand the surfaces of the pads with some fine grit sandpaper, but be aware that this may get abrasives from the sandpaper lodged in the pad's friction surfaces. Go as light as you can on them.

    Glazed brakes don't always screech, but the don't work terribly well and you've got to remove the pads to remove the glaze + clean the rotor with a solvent like isopropanol, denatured methanol, or a bike specific cleaning product such as Clean Streak - just make sure that you don't contaminate the rotor or pads with anything of any-sort.

    Automotive products should be avoided at all costs as their residue is designed to evaporate at auto brake operating temperatures. Bike discs don't get anywhere near hot enough,
    Halla-freakin'-loo-YAH! Someone finally gets it! <happy dance>
    Quote Originally Posted by tempest
    I don't think that the 'disc brake quiet' compounds are applicable to bike brakes either,
    They're not.
    Quote Originally Posted by tempest
    since they'd just contaminate the pads and attract contaminates into the calipers.
    Exactly right

  15. #15
    ÖöÖöÖöÖöÖö Dannihilator's Avatar
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    Had a doozy of one last week. Was working at the lbs someone brought in a fairly new bike. He said the bike was screaching when the brakes were applied, so he sprayed chain lube on the rotor so it would stop, and he was wondering why exactly the brakes suddenly didn't work well at all.
    Quote Originally Posted by scrodzilla
    I'm going out on the town tonight and it won't be over until I snort a line of habanero seeds off the hood of a red Fiero.
    Words and Stuff.
    pedal room thingy

  16. #16
    Mad Furyan Quick_Torch C5's Avatar
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    Quote Originally Posted by Mr. Smashy
    Had a doozy of one last week. Was working at the lbs someone brought in a fairly new bike. He said the bike was screaching when the brakes were applied, so he sprayed chain lube on the rotor so it would stop, and he was wondering why exactly the brakes suddenly didn't work well at all.
    At my auto shop, we get people who come in complaining about squeaking brakes or brakes that don't stop as well as they should. One gentleman decided it looked cool to paint his rotor hats, so he ends ups painting the WHOLE rotor(squeak squeak). Another guy(just last week) complained about noises and squeals after he detailed his car(got tire dressing all over the calipers, pads, and rotors)...geee, I wonder why they make SO much noise
    Why is going slower harder?

  17. #17
    I drink your MILKSHAKE Raiyn's Avatar
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    Quote Originally Posted by Mr. Smashy
    Had a doozy of one last week. Was working at the lbs someone brought in a fairly new bike. He said the bike was screaching when the brakes were applied, so he sprayed chain lube on the rotor so it would stop, and he was wondering why exactly the brakes suddenly didn't work well at all.
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