Advertise on Bikeforums.net



User Tag List

Results 1 to 12 of 12
  1. #1
    Resident Old Fart Olebiker's Avatar
    Join Date
    Sep 2004
    Location
    Tallahassee, FL
    My Bikes
    Douglas Precision Ti
    Posts
    1,299
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Noise only when in middle cogs

    My road bike is set up with Campagnolo Centaur 3 X 10. Recently it started making noise as if the rear derailleur was not adjusted correctly. The noice would only occur in about three of the cassette cogs in the middle of the cassette. The noise only occurs when I am pushing hard, so I have not been able to duplicate it while the bike is on the repair stand.

    I replaced the chain. The noise continued. I replaced the cassette and the noise continued. It happens on both the the large and small chainring. I am totally bumfuzzled.
    Wag more, bark less

  2. #2
    Gone, but not forgotten Sheldon Brown's Avatar
    Join Date
    Jul 2002
    Location
    Newtonville, Massachusetts
    My Bikes
    See: http://sheldonbrown.org/bicycles
    Posts
    2,301
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Olebiker
    My road bike is set up with Campagnolo Centaur 3 X 10. Recently it started making noise as if the rear derailleur was not adjusted correctly. The noice would only occur in about three of the cassette cogs in the middle of the cassette. The noise only occurs when I am pushing hard, so I have not been able to duplicate it while the bike is on the repair stand.

    I replaced the chain. The noise continued. I replaced the cassette and the noise continued. It happens on both the the large and small chainring. I am totally bumfuzzled.
    How long did you ride it after replacing the chain before replacing the casstte? If the cassette and chain were both toasted, you should have replacet them both at once.

    If you put on a goodly number of miles with a new chain on a worn cassette, the chain would wear very rapidly to match the worn sprockets.

    Since you live in Florida, it wouldn't be surprising if most or all of your sprocket wear was to the middle three sprockets.

    My advice is to measure the chain for 'stretch' as explained at:

    http://sheldonbrown.com/chains

    Sheldon "Simultaneity" Brown
    +-------------------------------------------------+
    | One measurement is worth 50 expert opinions |
    | --Howard Sutherland |
    +-------------------------------------------------+
    [COLOR=blue][CENTER][b]Harris Cyclery, West Newton, Massachusetts[/b]
    Phone 617-244-9772, FAX 617-244-1041
    [URL= http://harriscyclery.com] http://harriscyclery.com[/URL]
    Hard-to-find parts shipped Worldwide
    [URL=http://captainbike.com]http://captainbike.com[/URL]
    Useful articles about bicycles and cycling
    [URL=http://sheldonbrown.com]http://sheldonbrown.com[/URL] [/CENTER] [/COLOR]

  3. #3
    Senior Member
    Join Date
    Aug 2005
    Location
    Pittsburgh, PA
    My Bikes
    '''96 Litespeed Catalyst, '05 Litespeed Firenze, '06 Litespeed Tuscany, '12 Surly Pacer, All are 3x8,9 or 10. It is hilly around here!
    Posts
    24,788
    Mentioned
    4 Post(s)
    Tagged
    0 Thread(s)
    Have you made any adjustments to the rear derailleur's cable tension? Your FL address makes me thing you ONLY use the middle cogs so a mis-adjusted rd would also account for the noise.

  4. #4
    Resident Old Fart Olebiker's Avatar
    Join Date
    Sep 2004
    Location
    Tallahassee, FL
    My Bikes
    Douglas Precision Ti
    Posts
    1,299
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by HillRider
    Have you made any adjustments to the rear derailleur's cable tension? Your FL address makes me thing you ONLY use the middle cogs so a mis-adjusted rd would also account for the noise.
    Sure have. It only makes the noise while under a heavy load. If I am just spinning along, it is quiet.
    Wag more, bark less

  5. #5
    Resident Old Fart Olebiker's Avatar
    Join Date
    Sep 2004
    Location
    Tallahassee, FL
    My Bikes
    Douglas Precision Ti
    Posts
    1,299
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Sheldon Brown
    How long did you ride it after replacing the chain before replacing the casstte? If the cassette and chain were both toasted, you should have replacet them both at once.
    I only rode about fifty miles with the new chain before replacing the cassette. When I took the old chain off and measured it there was little if any stretch. The cassette only had about 3,000 miles on it.
    Wag more, bark less

  6. #6
    Senior Member
    Join Date
    Feb 2005
    Location
    Oklahoma
    My Bikes
    Trek 510, Trek 5500, Colnago C-50
    Posts
    8,856
    Mentioned
    2 Post(s)
    Tagged
    0 Thread(s)
    Are you using enough torque when you tighten the lockring?

  7. #7
    Resident Old Fart Olebiker's Avatar
    Join Date
    Sep 2004
    Location
    Tallahassee, FL
    My Bikes
    Douglas Precision Ti
    Posts
    1,299
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Al1943
    Are you using enough torque when you tighten the lockring?
    <sheepish> I don't know. I don't have a torque wrench (yet). I guess I had better get one. Do you think that might be the problem? </sheepish>
    Wag more, bark less

  8. #8
    Senior Member
    Join Date
    Feb 2005
    Location
    Oklahoma
    My Bikes
    Trek 510, Trek 5500, Colnago C-50
    Posts
    8,856
    Mentioned
    2 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Olebiker
    <sheepish> I don't know. I don't have a torque wrench (yet). I guess I had better get one. Do you think that might be the problem? </sheepish>
    The reason I asked is because my one experience with a noisy cassette, mostly middle cogs, was due to low torque on the lockring. A torque wrench would be good but is not required. You can try tightening it to see if that eliminates the noise. The torque spec is probably shown on the lockring. It needs quite a bit of torque.

    Al

  9. #9
    Resident Old Fart Olebiker's Avatar
    Join Date
    Sep 2004
    Location
    Tallahassee, FL
    My Bikes
    Douglas Precision Ti
    Posts
    1,299
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Al1943
    The reason I asked is because my one experience with a noisy cassette, mostly middle cogs, was due to low torque on the lockring. A torque wrench would be good but is not required. You can try tightening it to see if that eliminates the noise. The torque spec is probably shown on the lockring. It needs quite a bit of torque.

    Al
    The latest thing I see on the Campy Web site is 36.9 lbs/ft. I can always justify a tool purchase.
    Wag more, bark less

  10. #10
    I eat carbide. Psimet2001's Avatar
    Join Date
    Jan 2006
    Location
    Elgin, IL
    My Bikes
    Lots. Current sponsors - Giant and Specialized
    Posts
    19,234
    Mentioned
    6 Post(s)
    Tagged
    0 Thread(s)
    OK, you've already swapped out the most likely culprits. When you mention that it is only when you go hard it makes me think of a chain-mesh sound. You mentioned that it sounds as though the rd is not adjusted...

    Is is a higher pitched - "whirrrrrrrrrrrrrrr" or a "clickity-clickity-clickity", or more like a "ooooooooooooooooaklahoma where the ...."

  11. #11
    Resident Old Fart Olebiker's Avatar
    Join Date
    Sep 2004
    Location
    Tallahassee, FL
    My Bikes
    Douglas Precision Ti
    Posts
    1,299
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Psimet2001
    OK, you've already swapped out the most likely culprits. When you mention that it is only when you go hard it makes me think of a chain-mesh sound. You mentioned that it sounds as though the rd is not adjusted...

    Is is a higher pitched - "whirrrrrrrrrrrrrrr" or a "clickity-clickity-clickity", or more like a "ooooooooooooooooaklahoma where the ...."
    More of a "whirrrrrrrrr".

    I'm going to be out of town for the rest of the week but I will buy a torque wrench Saturday and put the old German torque on it. You know, gutentight.
    Wag more, bark less

  12. #12
    Senior Member
    Join Date
    Feb 2005
    Location
    Oklahoma
    My Bikes
    Trek 510, Trek 5500, Colnago C-50
    Posts
    8,856
    Mentioned
    2 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Olebiker
    More of a "whirrrrrrrrr".

    I'm going to be out of town for the rest of the week but I will buy a torque wrench Saturday and put the old German torque on it. You know, gutentight.
    Unless you just want a torque wrench I'd say tighten it with a 12" wrench to see if that cures the noise.
    Chains go "whirrrrr". Loose cassettes go "clinkety clank".

    Al

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •