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  1. #1
    Have bike, will travel Barrettscv's Avatar
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    Can I put a 10 speed chain on a 9 speed chainwheel?

    Can I?

  2. #2
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    Yes. There is no difference in the tooth thickness.

  3. #3
    Have bike, will travel Barrettscv's Avatar
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    I'm considering a 26 or 28t granny gear for my Shimano 105 Crankset. The crank now has 50, 39 & 30t chainrings. I'm using a 105 triple front derailluer and an Ultegra GS rear derailluer.

    I'm using a 10 speed chain, the bike is a 30 speed.

    The SG G-26 is the correct 74 BCD, but is discribed as a MTB chainring: http://cgi.ebay.com/Shimano-SG-G-26-...92346847569163

  4. #4
    Ovdabak, OR DArthurBrown's Avatar
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    +1 The only differences in 10 speed chains and 9 speed chains are the overall thicknesses. The interior thicknesses are the same.

    The only difference in a 10 speed chainring vs a 9 speed chainring is the machining of the chainring to position the teeth. On some 10 speed rings, the smaller chainring is machined to keep the chain closer to the big one.

    In practice, this really doesn't make any difference. The differences are too small to notice. You can actually even run a 10 speed chain on a 9 speed rear cluster, and some brands recommend this if you're using a 10-speed chainring with a 9-speed rear cluster.

  5. #5
    Ovdabak, OR DArthurBrown's Avatar
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    Quote Originally Posted by Barrettscv View Post
    I'm considering a 26 or 28t granny gear for my Shimano 105 Crankset. The crank now has 50, 39 & 30t chainrings. I'm using a 105 triple front derailluer and an Ultegra GS rear derailluer.

    I'm using a 10 speed chain, the bike is a 30 speed.

    The SG G-26 is the correct 74 BCD, but is discribed as a MTB chainring: http://cgi.ebay.com/Shimano-SG-G-26-...92346847569163
    Fundamentally, that idea should be fine. There are issues, however, with using chainrings from different sets. If you use a smaller chainring, for example, the front derailleur might not be able to accomodate it with your large chainring. 26 to 50 is a large spread. The machined ramps and pins may also not line up perfectly.

    Ignore the MTB description. Often times that just means it's heavier and likely more durable.

  6. #6
    Ovdabak, OR DArthurBrown's Avatar
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    I just read your posts in the other thread. Sounds like your deailleurs should handle that chainring size fine.

  7. #7
    Galveston County Texas 10 Wheels's Avatar
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    I have a 24T Grandpa gear with the 50-39. It works find with the 105DR
    [SIZE=1][B]What I like about Texas[/B]
    http://www.youtube.com/watch?v=PGukLuXzH1E

    Set F1re To The Ra1n ( NY Night Rain Ride)
    http://www.youtube.com/watch?v=W7jfcWEkSrI

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