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  1. #1
    www.titusti.com montlake_mtbkr's Avatar
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    Time to replace BB?

    I'm hearing a clicking noise coming I believe from the BB. I'm almost positive it's not the chain or rings. I clean the chain and rings weekly and if I turn the crank when the bike is suspended there's no clicking.
    It's only when my full weight is on the bike and pedaling that I hear a short "click-click-click" every time my right leg pushes down on the right crank/pedal. I don't know what type BB I have, it's stock '01 Trek 4500.

    Any ideas? It doesn't seem to affect the bikes performance but it's kind of annoying.

  2. #2
    Kev
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    Have you checked to see if the crank bolts are loose, they can create that type of noise.

  3. #3
    have bike will tour catfish's Avatar
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    also check the bb for tightness and correct torque.

  4. #4
    www.titusti.com montlake_mtbkr's Avatar
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    um ok, how do I do that?

  5. #5
    Kev
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    Here you go check this out for directions.

    http://www.parktool.com/repair_help/...queaking.shtml

  6. #6
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    Try checking your peadls for any play, the spindle can sometimes come loose and make that annoying clicking sound.

    good luck.

  7. #7
    feros ferio John E's Avatar
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    A long shot, but potentially very dangerous -- if a crank is starting to fail at the pedal eye or the spindle eye, it may start creaking before it actually fractures. A loose crank fixing bolt is a very likely cause of creaking from that area of the bike.
    "Early to bed, early to rise. Work like hell, and advertise." -- George Stahlman
    Capo [dschaw'-poe]: 1959 Modell Campagnolo, S/N 40324; 1960 Sieger, S/N 42624
    Peugeot: 1970 UO-8, S/N 0010468
    Bianchi: 1981 Campione d'Italia, S/N 1.M9914
    Schwinn: 1988 Project KOM-10, S/N F804069

  8. #8
    Mr. Cellophane RainmanP's Avatar
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    These are all good ideas. Apparent bb/crank clicking can be caused by a number of things - loose chainring bolts, loose pedals, even your saddle or seatpost. I had a squeaking sound in my crank area that was driving me crazy. I finally figured out that the way I had my cleats adjusted the rubber sole of my shoe was lightly rubbing the crank with every revolution. Chainring bolts are the easiest thing to check. Just take a 5 mm allen key and see if they are tight. Pedals take a 15 mm wrench though some have flats too narrow for a standard wrench. Checking your bb itself requires special tools. You would probably be better off letting your LBS take a look. They will only charge a few bucks to check and overhaul an old cup and cone bb with new bearings. If you need a new cartridge bb (they aren't intended to be serviced) they aren't expensive. Cup and cone bb's should be overhauled about once a year. If it has been longer than that go ahead and have it done at your LBS.

    Don't get me wrong. I encourage you to learn to work on your own bike, but I personally consider the bb more of an intermediate procedure, not something to start off with.
    Last edited by RainmanP; 03-29-03 at 10:03 AM.
    If it ain't broke, mess with it anyway!

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