Cycling Equipment · Public discussion

Help me identify noise ?

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Cycling Equipment
Published
14 November 2007
Last activity
19 November 2007
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  1. Hi all,

    Recently I've noticed a somewhat crackling noise when I start pedaling
    or pedal hard. It disappears when my cadence rises and my pedal cycle
    gets smooth. So basically it only cracks when the torque is high. I've
    checked the bottom bracket and although I lack the tools for
    disassembling it entirely the bracket and drivetrain/cranks looks to
    be rock solid, no lateral motion whatsoever.

    It's a relative new bike with only about 1500 miles on it and apart
    from this noise everything runs smoothly and works exactly like it
    should. It does not appear to affect functionality in any way.

    Should I be concerned about this? I generally don't like any noise
    whatsoever on a bike so I do try to figure it out and fix it.

    thx !


  2. Quoted message said:


    Recently I've noticed a somewhat crackling noise when I start pedaling
    or pedal hard. It disappears when my cadence rises and my pedal cycle
    gets smooth. So basically it only cracks when the torque is high. I've
    checked the bottom bracket and although I lack the tools for
    disassembling it entirely the bracket and drivetrain/cranks looks to
    be rock solid, no lateral motion whatsoever.

    It's a relative new bike with only about 1500 miles on it and apart
    from this noise everything runs smoothly and works exactly like it
    should. It does not appear to affect functionality in any way.

    Should I be concerned about this? I generally don't like any noise
    whatsoever on a bike so I do try to figure it out and fix it.

    This worked for me: If you can't borrow them, get the bottom bracket
    removal tool and a crank puller from your LBS - should be < £30 for
    the two.

    Pack the bottom bracket threads and the crank spindle with plenty of
    'Copper Grease' and then put it all back together again.

    Would be worth taking your bike to the shop to make sure you get the
    right tools, I got the wrong shaped crank puller and (after an all-
    mighty effort) destroyed the end-piece trying to shift the cranks.

    Maybe your LBS would take the BB out for you at little or no cost...?

    Regards,

    Duncan

  3. Quoted message said:

    Hi all,

    Recently I've noticed a somewhat crackling noise when I start pedaling
    or pedal hard. It disappears when my cadence rises and my pedal cycle
    gets smooth. So basically it only cracks when the torque is high. I've
    checked the bottom bracket and although I lack the tools for
    disassembling it entirely the bracket and drivetrain/cranks looks to
    be rock solid, no lateral motion whatsoever.

    Check the clamping bolt on your seat post. It might be just a tiny bit
    loose.

    \\paul

  4. Quoted message said:

    Hi all,

    Recently I've noticed a somewhat crackling noise when I start pedaling
    or pedal hard. It disappears when my cadence rises and my pedal cycle
    gets smooth. So basically it only cracks when the torque is high. I've
    checked the bottom bracket and although I lack the tools for
    disassembling it entirely the bracket and drivetrain/cranks looks to
    be rock solid, no lateral motion whatsoever.

    It's a relative new bike with only about 1500 miles on it and apart
    from this noise everything runs smoothly and works exactly like it
    should. It does not appear to affect functionality in any way.

    Should I be concerned about this? I generally don't like any noise
    whatsoever on a bike so I do try to figure it out and fix it.

    thx !

    Noises like this are usually associated with unlubricated threads- not
    unusual. As others have said, removing the bottom bracket, greasing
    the threads, and reinstalling the BB works most of the time. The
    spindle/crankarm interface is another common culprit.

    Once I had a bike that drove me crazy with a noise like this. I
    rebuilt the crank 3 times before I removed the pedals and greased the
    threads there. Problem solved.

    Jeff

  5. JeffWills said:
    Quoted message said:

    Hi all,

    Quoted message said:

    Recently I've noticed a somewhat crackling noise when I start pedaling
    or pedal hard. It disappears when my cadence rises and my pedal cycle
    gets smooth. So basically it only cracks when the torque is high. I've
    checked the bottom bracket and although I lack the tools for
    disassembling it entirely the bracket and drivetrain/cranks looks to
    be rock solid, no lateral motion whatsoever.

    Quoted message said:

    It's a relative new bike with only about 1500 miles on it and apart
    from this noise everything runs smoothly and works exactly like it
    should. It does not appear to affect functionality in any way.

    Quoted message said:

    Should I be concerned about this? I generally don't like any noise
    whatsoever on a bike so I do try to figure it out and fix it.

    Quoted message said:

    thx !

    Noises like this are usually associated with unlubricated threads- not
    unusual. As others have said, removing the bottom bracket, greasing
    the threads, and reinstalling the BB works most of the time. The
    spindle/crankarm interface is another common culprit.

    Once I had a bike that drove me crazy with a noise like this. I
    rebuilt the crank 3 times before I removed the pedals and greased the
    threads there. Problem solved.

    Jeff

    Ok, I've been scared of disassembling my bottom bracket because of all
    the sort of locking ring/thread systems etc. It's a bit overwhelming.
    Maybe I need to experiment on an old bike and get it sorted out. It
    goes without saying my main road bike needs to be out of service as
    short as possible. I tend to do all repairs and service myself just
    because I dislike waiting and calling the bike shop 😉 But I just
    dread ruining my gazillion dollar bike.
    I guess I need to go tool shopping and print out some Campy manuals.

    thx all

  6. tried ex lax?

  7. On Thu, 15 Nov 2007 13:40:49 -0800 (PST), webhead <[email hidden]>

    Quoted message said:

    I guess I need to go tool shopping and print out some Campy manuals.

    Tool shopping? Hammer, old screwdriver/chisel, some big channel locks
    and a small pair of vise grips for the stuff under 12mm. That's all
    you need!

  8. [email hidden said:

    "]Hi all,

    Recently I've noticed a somewhat crackling noise when I start pedaling
    or pedal hard. It disappears when my cadence rises and my pedal cycle
    gets smooth. So basically it only cracks when the torque is high. I've
    checked the bottom bracket and although I lack the tools for
    disassembling it entirely the bracket and drivetrain/cranks looks to
    be rock solid, no lateral motion whatsoever.

    It's a relative new bike with only about 1500 miles on it and apart
    from this noise everything runs smoothly and works exactly like it
    should. It does not appear to affect functionality in any way.

    Should I be concerned about this? I generally don't like any noise
    whatsoever on a bike so I do try to figure it out and fix it.

    thx !


    parktool.comreadhowto.asp

    Good lube like already suggested (I like anti-sieze compound suitable for the metal(s) involved) and specifications of torque + a good torque wrench.
    Sometimes just a 1/8 of a turn can make the difference.

  9. webhead said:


    Ok, I've been scared of disassembling my bottom bracket because of all
    the sort of locking ring/thread systems etc. It's a bit overwhelming.
    Maybe I need to experiment on an old bike and get it sorted out. It
    goes without saying my main road bike needs to be out of service as
    short as possible. I tend to do all repairs and service myself just
    because I dislike waiting and calling the bike shop 😉 But I just
    dread ruining my gazillion dollar bike.
    I guess I need to go tool shopping and print out some Campy manuals.

    thx all- Hide quoted text -

    Holy carp! Find a better bike shop- anybody who make you wait for what
    could be a minor adjustment (although BB/crank noises sometimes
    require exorcism) isn't worth a thing. At worst, they should try to
    diagnose it and then give you a drop-off and pick-up time... which
    should be the same day for a relatively new bike.

    Instead of printing PDF's, try looking over the various instructions
    at http://www.parktool.com/repair/ . The very latest Campy cranks are
    shown at http://www.parktool.com/repair/readhowto.asp?id=122#campy

    Jeff

  10. datakoll aka gene daniels said:


    tried ex lax?

    No.

    --
    Tom Sherman - Holstein-Friesland Bovinia
    "the grinning buddy bear carries a fork." - g.d.

  11. daveornee said:

    http://www.parktool.com/repair/readhowto.asp?id=98

    Good lube like already suggested (I like anti-sieze compound suitable
    for the metal(s) involved) and specifications of torque + a good torque
    wrench.
    Sometimes just a 1/8 of a turn can make the difference.

    As long as you can find specs for torque with anti-sieze. If the specs
    don't include that factor, you might as well just use the calibrated
    hand.

  12. I was experiencing a similar "crackling" noise that only occurred when
    pedaling hard. The cause turned out to be the saddle (Fizik Arione). I
    could make the sound by pressing down on the seat edges with my hands. I
    squirted WD-40 into all of the spaces where the rails are inserted into
    plastic housing and the noise stopped.

    Ken

    <[email hidden]> wrote in message
    news:[email hidden]...

    Quoted message said:

    Hi all,

    Recently I've noticed a somewhat crackling noise when I start pedaling
    or pedal hard. It disappears when my cadence rises and my pedal cycle
    gets smooth. So basically it only cracks when the torque is high. I've
    checked the bottom bracket and although I lack the tools for
    disassembling it entirely the bracket and drivetrain/cranks looks to
    be rock solid, no lateral motion whatsoever.

    It's a relative new bike with only about 1500 miles on it and apart
    from this noise everything runs smoothly and works exactly like it
    should. It does not appear to affect functionality in any way.

    Should I be concerned about this? I generally don't like any noise
    whatsoever on a bike so I do try to figure it out and fix it.

    thx !

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