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  1. #1
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    Disk brakes rubbing

    I have 8" Hayes disk brakes on my Brodie.

    I understand that they flex and that they cause a pinging sound but the front brake has a rubbing sound. It doesn't seem that there is any loss of power or that the calipers are grabbing but there is this freqent rubbing sound when I am cycling with absolutely no pressure on the brakes.

    I have taken it to the LBS and they say this is common with the 8" rotors.

    Is this true ?

    Justen

  2. #2
    Apot. sshock4's Avatar
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    yea, any disc brake will rub, its more of a problem with 8 inch rotors because its easier to bend them. for example thinking about how much easier it would be to bend an 8 inch rotor then a 2 inch rotor, now just step up to a 6, its harder but not impossible...but anyways yea, its rubbing because the rotor is slightly bent. if you find an autoshop or machine shop with a hydro press you can have them toss the rotor under it and it will be straight again, and if thats not an option, just straighten it by hand, with a crecent wrench or something similar,

    good luck in getting it all worked out.
    surly1x1

  3. #3
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    Originally posted by sshock4
    yea, any disc brake will rub, its more of a problem with 8 inch rotors because its easier to bend them. for example thinking about how much easier it would be to bend an 8 inch rotor then a 2 inch rotor, now just step up to a 6, its harder but not impossible...but anyways yea, its rubbing because the rotor is slightly bent. if you find an autoshop or machine shop with a hydro press you can have them toss the rotor under it and it will be straight again, and if thats not an option, just straighten it by hand, with a crecent wrench or something similar,

    good luck in getting it all worked out.
    Thanks for the suggestion. Although, when I took it to the bike shop, they checked out both rotors and said they were fine and not bent at all.

    How easy is it to bend them ?
    I have only had the opportunity to take this bike Mountain biking once..otherwise it has only been on the road and never dropped or hit.

    I can't think of any time that the front rotor would have sustained any damage.

    Justen

  4. #4
    Senior Member Jim311's Avatar
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    Rotors get hot, and when metal gets hot, it warps fairly easily.. could be what happened, or your pads could be adjusted in too far.
    My money pits:

    Cannondale Jekyll 500 with Avid Mechs and Sun DS2 rims with XT disc hubs.

    Cannondale F900 with SRAM XO shifters/derailler, Mavic X3.1 tubeless wheels, Avid Mechs, Race Face Next LP cranks, Time ATAC pedals, SRAM levers.

  5. #5
    Junior Member
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    I have the same brakes. Sometimes they get dust or whatever on the and make a scraping sound- to cure it I just quickly and firmly jam the brakes a few times toclean the rotor and pads. Also you should remove the pads and check for glazing- if so just replace them.

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