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  1. #1
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    New question here. Next step for fixing rattling brakes

    Symtoms:Shimano M505, front brake pads rattle when peddling hard side to side or hitting rough terrain. They klink a little too when turning the wheel upside down.

    Diagnosis: my first diagnosis was a retaining spring that was too loose. I've taken it out, spread it to add more force and same issue.

    Diagnosis 2: sticky piston. With the pads off and gently pumping brakes i see one caliper coming out more than the other.

    Next step (after doing research) = cleaning the sticky piston, lubricating with mineral oil,

    Next step if not fixed = bleeding out a little bit of fluid to create a bigger gap for the rotor.

    Am I going in the right direction?
    Noobish
    2013 Cannondale Trail 29er 1
    1990ish Specialized Hardrock

  2. #2
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    Alright - too many good suggestions! I'll just do what I documented and see what happens.
    Noobish
    2013 Cannondale Trail 29er 1
    1990ish Specialized Hardrock

  3. #3
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    Do the brakes work good?

    A lot of brake pads are loose in caliper. Are they rubbing or just rattling?

  4. #4
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    Sometimes the rub very very little. When I spin the wheel I hear a little tick. As the pads wear in a little it will go away. Mostly its the rattling that bothers, and its a little loud. The breaks work really good.
    Noobish
    2013 Cannondale Trail 29er 1
    1990ish Specialized Hardrock

  5. #5
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    Take some small rubber O rings put those on split pin next to pads.

  6. #6
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    So is this rattle most likely the pads against the breaks? Or the pads against the rotor?

    If it's not the rotor then I see how o rings would help.
    Noobish
    2013 Cannondale Trail 29er 1
    1990ish Specialized Hardrock

  7. #7
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    Hard to tell without me hearing it. If they work fine, maybe just accept the noise.

    You can try to take the pads from the rear brake and switch with front, see what happens.

    If the noise continues it is just a feature of the brake. Unless the pads were installed incorrectly.

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