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Creak ... in 3rd & 4th cog only ??

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Creak ... in 3rd & 4th cog only ??

Old 06-08-07, 09:40 AM
  #1  
neil0502
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Creak ... in 3rd & 4th cog only ??

I've got bike noise that's vexing me ... and I'm usually quite self-sufficient.

Here goes:

Machine:
- Moots Vamoots (Ti)
- All Campy Record w/3x10 drivetrain
- Campy Eurus wheels

I've got a click/creak that seems to occur with each HALF pedal revolution (twice per full), BUT
ONLY in the #3 and #4 cogs (counting from inboard to outboard) ... and regardless of which ring.

I took off pedals, rings, cranks, and BB, cleaned, re-greased (nickel anti-seize for
bb), and properly torqued everything, cleats included. No dice.

It happens if I'm standing OR sitting (not the seat/post), hands on or off the bars, climbing or
on flats. Does NOT happen in any other gear. Just #3 and #4. In any other gears, it's just perfect

Took off the rear wheel and checked cassette lockring tightness. Seems fine. No notable wear on
cogs. Nothing seems loose. Derailer straight. Shifting perfect. Wheels nicely trued.

I DO have another rear wheel I could throw on to isolate the issue (haven't yet), but ... any thoughts??
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Old 06-08-07, 10:31 AM
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Iowegian
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I'd try the other wheel. It could be a slight bit of play between cog and hub on those two. Otherwise, could be something about the angle of the chain on those cogs that is pulling on some other parts just so, though that seems unlikely since it occurs in all rings.
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Old 06-12-07, 11:37 AM
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Good thought, Iowegian, and thanks.

The answer seems to have been ... take off all cogs and spacers, clean everything up well, lube and replace, then clean, lube, and re-torque the cassette lockring.

Hm. Whatever. Quiet now
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