Loud jockey pulleys on DA 7900 RD
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  1. #1
    DCE
    DCE is offline
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    Jul 2010
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    Loud jockey pulleys on DA 7900 RD

    I'm new on the forum. Hope someone can shed some light on this.

    The jockey pulleys on my 7900 RD seem to not mesh with the chain perfectly and make a slight cracking sound as the chain goes through them. It seems to not make the noise, or it is less, when it is on the smallest rear cog.

    The bike shifts perfectly and runs perfectly. Adjusting the B screw doesn't change it.

    The bike has about 1200 miles on it. It made the sound from the beginning. The drive train, cassette are full DA 7900. The casset and freewheel seem to be fine. I have tried many chain lubes and the sound persists.

    Is this something that is common with the 7900 RD?

    Thanks!

  2. #2
    RoadBikeReview Member
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    See the thread re:noise in the 6700 drive train. Same advice for your DA.

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