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  1. #1
    Senior Member JMT114's Avatar
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    Is my rear derailleur 10 speed compatible?

    I have a 2007 Giant OCR 2. The rear dérailleur is a Shimano 105. I believe I saw somewhere that it might be both 9 and 10 speed compatible. Right now it is a nine speed set up using tiagra shifters.

    If I replace the shifters with ten speed shifters will this dérailleur work?
    My name's Jim, but most people call me...Jim

  2. #2
    Senior Member capwater's Avatar
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    Derailler is dumb, shifters control the speeds. No problem.

  3. #3
    biked well well biked's Avatar
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    Quote Originally Posted by JMT114 View Post
    If I replace the shifters with ten speed shifters will this dérailleur work?
    Yes, the derailleur will work with any Shimano index shifters except pre-nine-speed Dura Ace, including 6,7,8,9, or 10 speed. The key is to match the ten speed shifters to a ten speed cassette, and get a ten speed chain. If you were to stick with the nine speed cassette, there's an alternate cable routing techique on Sheldon's site you might try, which might give you satisfactory results shifting with ten speed shifters and a nine speed cassette. But if you're going to get ten speed shifters, my thought would be to go to a ten speed cassette (and chain), also-

  4. #4
    Senior Member JMT114's Avatar
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    OK, Thanks for the quick responses.

    After reading the Sheldon brown article about front dérailleurs, it looks like the only thing I would need to change to go from 9 to 10 speeds are new shifters, a ten speed cassette, and a new ten speed chain.

    Is this correct, assuming I would get new cables when I buy the shifters
    My name's Jim, but most people call me...Jim

  5. #5
    Senior Member capwater's Avatar
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    Don't forget the 10 speed bar tape!

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