Creaky bottom bracket?

Discussion in 'Cycling Equipment' started by cjw66, Oct 2, 2006.

  1. cjw66

    cjw66 New Member

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    Hi, I'm pretty new to road riding. I just got a new road bike (assembled at my LBS) and took it out for a couple of shakedown spins over the weekend. Everything was pretty smooth but I noticed that when I got out of the saddle and really stomped on the pedals for a sharp incline or short sprint I heard a creaky noise coming from the bottom bracket area. Any idea what this might indicate and/or how I might correct it?

    Thanks for any advice!
    -Chris

    p.s. On the first ride the pedals (Look compatible) were making squeaky noises but a little WD40 cleared that up. So it's not the pedals.
     
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  2. dhk2

    dhk2 Active Member

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    I'd take it right back to the LBS and have them fix it. Could be the BB or crank arms weren't properly assembled or torqued. Either way, it will take specialized tools and knowledge to find and fix the creaking.

    Any decent LBS will cover all adjustments and repairs like this one; you shouldn't have to mess around with a new bike.
     
  3. unicos

    unicos New Member

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    Its not a big deal. Bottom brackets usually loosen up on a new bike. It does seem a bit quick to get creaking though. Take it by the LBS that assembled it and they should be willing to take a look at it for you. It should only need retightening
     
  4. capwater

    capwater New Member

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    Check: BB, crank rings bolts, crank bolts, pedals. Often times you think a noise is coming from a place it isn't.
     
  5. cjw66

    cjw66 New Member

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    Thanks for all the advice. This was my first post to the forums and I really appreciate the help. I'll take the bike back to my LBS for inspection and/or re-tightening of BB, crank, pedals, etc.
     
  6. pod

    pod New Member

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    I wouldn't use WD40 as a lubricant as it will evaoprate fairly quickly and may tend to cause the grease in the bearings to loose viscosity and run out.
     
  7. cjw66

    cjw66 New Member

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    Thanks for the tip. What kind of lubricant would you suggest for squeaky pedals?
     
  8. pod

    pod New Member

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    The bearings should have a light grease and if it had a squeak I'd try and work some grease in from the side. If that didn't get rid of the squeak then a drop or two of light oil should do the trick.
     
  9. velomane

    velomane New Member

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    I was suffering from the same annoyance as well. I took apart the whole bottom bracket area, reassembled with grease, teflon tape, whatever I could think of, always to no avail.

    Turns out the bloody problem was the rear QR. I took that off, cleaned it, gave it a tiny drop of lube and voila, a quiet machine once again.

    Good luck.
     
  10. cjw66

    cjw66 New Member

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    I appreciate the advice. Can you tell me what QR means?
     
  11. dhk2

    dhk2 Active Member

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    QR is the quick release skewer for the rear wheel. Velomane makes an important point, that lots of noises sound like BB or crank noises, but aren't. I spent about a year with a slight creaking noise under medium-load conditions that I thought was coming from the BB. Turns out it was coming from the left rear dropout, which is two-piece on my bike. The dropout and connecting screw was all sealed with paint, but after breaking the paint layer found there was a slight bit of rust underneath the screw where it seats into the aluminum dropout. Once I found it, was about 5 minutes to clean the screw, apply some grease and put it back together.

    That's why it's best to have a real mechanic check this stuff out...particularly on a new bike in warranty.
     
  12. cjw66

    cjw66 New Member

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    Very helpful info. Thanks!
     
  13. carpediemracing

    carpediemracing New Member

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    if using a frame with a replaceable rear dropout (the piece the rear derailleur bolts to), make sure that is secure/greased. this is a notorious piece for squeaking on virtually any bike with replaceable dropouts.

    the squeaky look pedals might be cleats squeaking against the pedal. some light grease/oil might help, although I don't have experience with what is okay on the cleats/pedal.

    as pointed out by everyone else, a squeaky rear dropout would be something the LBS can and should handle.

    congrats on your new bike
    cdr
     
  14. capwater

    capwater New Member

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    If it's the cleats, a dab of chap stick will quiet them down.
     
  15. rdk

    rdk New Member

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    I've just got my bike back from the shop. I'd tired everything to remove the clicking sound from the crank area. At the shop the mechanic thought it was (in order of checking then trying again):
    1) loose chainring bolts
    2) loose spokes
    3) bottom bracket

    Turns out it was a slightly loose cassette lock ring that needed the slightest amount of tightening. I could have sworn the sound was from the crank/bottom bracket area, and so did the mechanic at first.
     
  16. Rayzor

    Rayzor New Member

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    Thanks so much for the tip, I too had a creaking sound that appeared to be coming from the bottom bracket that was driving me mad, after a trip to the LBS it was no better and they couldn't help. I followed your suggestion and magic no more creaking

    Thanks
     
  17. pod

    pod New Member

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    I had a click/creak sound when peddaling under load. I checked everything else and finally solved the problem by replacing the worn out bottom bracket.

    Once I had the culprit off the bike, I could barely here the slight metalic click when I turned the axel by hand but when it was on the bike it seemed to get amplified greatly by all the tubes and drove me nuts.
     
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