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  1. #1
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    10 speed rear d with 9 spd everything else

    I have to replace my rear d. I plan to upgrade the entire drive train to 10spd, but cannot afford all of the components right now. Would a Sram x.9 10spd rear d be compatible with a 9 spd shifter/cassette? This may seem silly but I'm thinking if they both use the same actuation then perhaps they would be compatible. I realize that it would almost certainly require a 10spd chain, but I could use a new chain as well anyway.
    P=DAL, P=DAL, P=DAL!

  2. #2
    Former Bike Wrench
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    No, SRAM 10 speed rear derailleurs do not work with their 9 speed shifters...it is NOT the same pull ratio.

  3. #3
    Nouveau Retrogrouch SuperModerator
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    Quote Originally Posted by twobournes View Post
    I have to replace my rear d. I plan to upgrade the entire drive train to 10spd, but cannot afford all of the components right now. Would a Sram x.9 10spd rear d be compatible with a 9 spd shifter/cassette? This may seem silly but I'm thinking if they both use the same actuation then perhaps they would be compatible. I realize that it would almost certainly require a 10spd chain, but I could use a new chain as well anyway.
    Not the same. 9- and 10-speed RDs/shifters can not be mixed.
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  4. #4
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    Thanks for the quick response. That sucks, but not as bad as buying the der and finding out the hard way!
    P=DAL, P=DAL, P=DAL!

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