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  1. #1
    Bicycle Luge Racer khackney's Avatar
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    Another Ultegra 9/10 mix question...

    Ok, I'm doing some upgrading. I've got new Ultegra 9 speed STI brifters coming, a new 9 speed front derailer but a new 10 speed rear derailer. The Shimano tech paper said it will work. But will I have to use a 10 speed chain? No mention of that on their site.
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  2. #2
    Senior Member sydney's Avatar
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    Quote Originally Posted by khackney
    Ok, I'm doing some upgrading. I've got new Ultegra 9 speed STI brifters coming, a new 9 speed front derailer but a new 10 speed rear derailer. The Shimano tech paper said it will work. But will I have to use a 10 speed chain? No mention of that on their site.
    QBP says it's compatible with 9 and 10 speed drivetrains.

  3. #3
    Senior Member juicemouse's Avatar
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    I'd use a 9s chain.
    It is my belief that every person in this world has something to teach, and everything to learn.

    In memory of Jim Price (aka. sydney) ...

  4. #4
    "Uh-uh. Respek Knuckles." hypersnazz's Avatar
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    9 speed chain is what all the bikes that come stock with this setup use (9s gruppo with 10s rear derailleur), and it works beautifully. If you were to put a 10s chain on a 9s cassette it may or may not work as cleanly since 10s chains are a little narrower.

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