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  1. #1
    mtbr member
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    Idea! 7 speed derailleurs on 8 speed system?

    Will 7 speed derailleurs work on an 8 speed system?

    I plan on upgrading to 8 speed derailleurs in the future. For now I hope the 7 speed derailleurs will work.

    Also, will a 9 speed chain negatively impact the 7 or 8 speed derailleur?

    Thank you

  2. #2
    mtbr member
    Reputation: Joules's Avatar
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    Oct 2005
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    2,302
    yes. There really isn't such thing as a dedicated 8s derailleur vs a 7s.

    9s chain would probably make more noise than a 7/8s and cost more. I see no real benefit to it, but if that's all that's available go for it.

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