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  1. #1
    mtbr member
    Join Date
    Jun 2004

    Shimano XT FC-M780 Crankset Plastic Ring on Drive Side

    Several weeks ago my crankset came loose, so I figured I would take it apart and clean it for good measure. After taking the drive side out of the bottom bracket I noticed a plastic ring that had been damaged, and I also noticed a lot of shavings that fell to the ground that came from this part. Does anyone know what this piece is called so I can order a new replacement? I have attached photos and also a pointer to where I found this piece on my crank. Thanks in advance!
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  2. #2
    mtbr member
    Join Date
    Nov 2011
    I think you will find that is part of the BB. I'd say you need a new BB.

  3. #3
    BOOM goes the dynamite!
    Reputation: noapathy's Avatar
    Join Date
    Jun 2008
    +1 on the dead bottom bracket

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