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bb creaking -- only middle crank

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bb creaking -- only middle crank

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Old 07-02-06, 02:53 PM
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bb creaking -- only middle crank

Its a single piece crank. Drive train is whisper quiet in both the big and small crankwheels, but on the center wheel there is a loud duck like creaking (quack quack every half revolution), that seems to come from BB area.

Is this common? - what can be the cause?
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Old 07-03-06, 08:18 AM
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maybe lose or cracked chainring. check the chainring bolts.
 

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