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  1. #1
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    Replace Ultegra 6603 chainring with 6703.

    Excuse me if this has been answered before, but I have searched and not found an answer. Can I replace an Ultegra 6603 chainring with a 6703? Specifically, the 39 tooth middle ring, but in general, any of the rings. I don't see any reason not to, but am I overlooking something? Thanks

  2. #2
    Low car diet JiveTurkey's Avatar
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    No, as I gather from the description on this site: http://www.speedgoat.com/Catalog.aspx/Browse?Prod=19321

    "6703, triple version uses a proprietary middle chainring that doubles as interface for small/inner chainring mounting"

    P-19321..jpg
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  3. #3
    Senior Member
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    Thanks JT. That answers it up for me. Much appreciated!!!

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