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  1. #1
    Junior Member
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    chainrings upgrade

    so I just learned what the mm numbers refer to when shopping for replacement rings, but can someone tell me if a new "9 speed" chainring will still work when the rear shifters are older 7 speed?

    Do I need to look for 7 speed models?

    Thanks
    I just wanna get to the bottom of this.

  2. #2
    Mr. Cellophane RainmanP's Avatar
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    Samoi,
    Welcome to BikeForums! If you are talking about just replacing a single chainring, there is no problem. The individual chainrings on a 9-speed crankset may be just a little thinner, but this should not be a problem. Chainring spacing does not seem to be as critical as rear cog spacing. I am using Dura Ace 9-speed STI shifters with the original crankset on my Bianchi that was a 12-speed (2 front/6 rear). I did have to replace the front derailleur to get the proper movement, but the crankset works fine.
    Regards,
    Raymond
    If it ain't broke, mess with it anyway!

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