Squeaking Crank....or thereabouts.....

flappy
flappy Posts: 21
edited October 2007 in Commuting chat
I have a Sirrus Pro for my commute which is a couple of months old. There is a squeak on the downstroke of the left crank at mediam cadence. It is only there while pushing on the left pedal - If you only pull up on the pedals while riding clipless the noise is gone - everything seems tight - where should I look?

Comments

  • el_presidente
    el_presidente Posts: 1,963
    flappy wrote:
    I have a Sirrus Pro for my commute which is a couple of months old. There is a squeak on the downstroke of the left crank at mediam cadence. It is only there while pushing on the left pedal - If you only pull up on the pedals while riding clipless the noise is gone - everything seems tight - where should I look?

    This happened to me a few weeks ago. I stripped down the chainring bolts, pedals & cranks and regreased and retightened. Eventually found it was the connection between the crank arm and the bottom bracket axle, a hefty dollop of grease solved the problem.

    Your squeak might be elsewhere but sadly the only answer is trial & error
    <a>road</a>
  • graeme_s-2
    graeme_s-2 Posts: 3,382
    Most of the noises that I've had coming from that sort of area are either pedals or cleats, so I'd try and eliminate those first.
  • flappy
    flappy Posts: 21
    ..... thanks chaps - and it was.... pedals. The left hand smartie was falling apart - new to clipless and just assumed they wouldn't do that so soon - replaced by LBS under warranty
  • jbindman
    jbindman Posts: 1,328
    mysterious creaks often precede total failure of some component or other; if a drop of oil on something obvious doesn't clear it up its usually worth stripping everything down and hunting for it.
    fgg 1666
  • BentMikey
    BentMikey Posts: 4,895
    Flappy's squeaky crank - blimey, I really misread that for a moment. :oops: :oops:
  • simon_adams_uk
    simon_adams_uk Posts: 340
    Ditto advice above.

    The creak I could never find turned out to be in my left-hand crank arm as the interlocking teeth that mesh with the (octalink) bottom bracket cracked and failed. Cue two cranks arms pointing in the same direction...

    If you find any swarf in places where it shouldn't be things aren't looking too good!

    S

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