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BANG, CRACK, CRUNCH and SQUEEL

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  • June 21, 2012 at 1:41 pm #16138
    spongebob

    BANG, CRACK, CRUNCH and SQUEEL are the noises coming from my crank area, replaced my BB earlier this year.

    Could it have gone again? Could it be my frayed derailleur cable?

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  • June 21, 2012 at 2:23 pm #688009
    0
    thereandbackagain

    There is the chance that if
    There is the chance that if it’s sliding then the non-spider crank arm has worked its way off the splines, and by retightening and torquing it’ll be alright. If it’s notchy or gritty as you spin it then it’s probably hosed.

    June 21, 2012 at 2:01 pm #688007
    0
    spongebob

    It’s blatently fudged, it’s
    It’s blatently fudged, it’s GXP, I could feel it moving from side to side.

    Not on every rotation but perhaps once a minute.

    June 21, 2012 at 1:50 pm #688005
    0
    thereandbackagain

    Do the cranks wobble if you
    Do the cranks wobble if you grab the arms and try to move them perpendicular to the axis of the BB crank?

    If you unship the chain and gently spin the cranks is the result anything other than a butter-smooth rotation?

    Have you got a stupid FSA external BB that’s been within 500m of a puddle or atmospheric moisture?

    Have you got a stupid BB30 bottom bracket?

    If the answer to any of those questions is yes, then your BB may have gone again. Sorry about that.

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