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  1. #1
    Senior Member Jarrett2's Avatar
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    Noisy Disc Brakes?

    My disc brakes have recently become very noisy when stopping. Only the last few feet of the stop, both the front and back brake let out this loud groan/squeek noise just has I come to a stop. Is there a way to stop this?

  2. #2
    just pedal donalson's Avatar
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    adjustment could be off... but I would start by cleaning the rotors with rubbing alcohol...

    what brand are they?
    mtbr clyd moderator

  3. #3
    Pedals, Paddles and Poles Daspydyr's Avatar
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    Some people even "BAKE" the brake pads.

    http://www.bikeforums.net/showthread...our-pads-works

    Trying the adjustments first. I personally enjoy tweaking and working on my bike. Sometimes it gets overwhelming.

    You can also get a spray can of Brake Kleen at any auto parts store, its pretty much what donalson is suggesting. It is brake pad specific fix stuff.
    I think its disgusting and terrible how people treat Lance Armstrong, especially after winning 7 Tour de France Titles while on drugs!

    I can't even find my bike when I'm on drugs. -Willie N.

  4. #4
    Senior Member slowride454's Avatar
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    my BB7 mechanical road discs have always squealed and groaned like a banshee and not stopped all that well. My Shimano hydraulic disc on my MTB have been quiet and flawless.
    Specialized Roubaix - Canfield Brothers Yelli Screamy - GT Karakoram SS - Soma Double Cross Disc

  5. #5
    just pedal donalson's Avatar
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    Quote Originally Posted by slowride454 View Post
    my BB7 mechanical road discs have always squealed and groaned like a banshee and not stopped all that well. My Shimano hydraulic disc on my MTB have been quiet and flawless.
    shiggy, a supermod on MTBR with almost 50k posts posted this link the other day (to yet another forum that he's on lol)... good info

    http://www.velocipedesalon.com/forum...tml#post523038
    mtbr clyd moderator

  6. #6
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    First question, when was the last time the pads were replaced?

    My wife's disk brakes squealed. I change the pads and they got much better. Then I sanded each side of the rotors to get them clean and roughen them up a bit.

    Then, standing over top of the rotor/brake assmbly, center the rotor between the pads using the adjustment screws. There should be equal distance on both sides so when you pull the brake levers the pads contact the rotors at the same time and keep the rotor in a straign line. If they don't the rotor will flex one way or another. Err on the side of no rotor flex when adjusting even if it doesn't appear completely centered.

  7. #7
    just pedal donalson's Avatar
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    the centered thing is true if it's using hydros with 2 (or 4) opposed pistons... that is NOT the case if you are using a cable brake... on cables they are based around one piston moving and then bending the rotor over to the other pad... so the inboard (stationary) pad needs to be set as close to the rotor as you can get without drag... the bb7's made this easy to do, some other mechaincals I've used took a bit more work to get it right.
    mtbr clyd moderator

  8. #8
    Senior Member
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    Quote Originally Posted by slowride454 View Post
    my BB7 mechanical road discs have always squealed and groaned like a banshee and not stopped all that well. My Shimano hydraulic disc on my MTB have been quiet and flawless.
    My BB7 Road brakes stop well and make very little noise. The only time I hear them is when I've bent the brake rotor or mis-adjusted the pads so that one is constantly dragging on the disc.

  9. #9
    Senior Member Jarrett2's Avatar
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    I ended up just using a paper towel and cleaning the rotors well and problem solved.

  10. #10
    just pedal donalson's Avatar
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    glad it was that simple for you to fix
    mtbr clyd moderator

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