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  1. #1
    Newbie harishio's Avatar
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    Dec 2005
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    Giant TCRC3, Motobecane Messenger, Timberline GT
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    Ultegra upgrade questions

    I just started road cycling in 2005 after buying a Giant TCR C3. The bike came with 105 component group (except for a Tiagra front derailleur). I rode bike recently with Ultegra shifters and find them a lot more ergonomic. I'm planning to upgrade my shifters to Ultegra and have some questions.

    1) Does the Ultegra 10 speed shifter work with the Shimano 105 - 9 speed rear derailleur?

    2) Will the Ultegra 2 speed front derailleur work with the 105 - 9 speed rear derailleur? I think I need braze on's. I'm assuming so since I don't have any clamps on my front derailleur).

    Other details on my set up - Compact crank (34 / 50). Rear cassette - 12/26.

    Any advice will be very helpful.

  2. #2
    Senior Member
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    Aug 2005
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    Pittsburgh, PA
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    '''96 Litespeed Catalyst, '05 Litespeed Firenze, '06 Litespeed Tuscany, '12 Surly Pacer, All are 3x8,9 or 10. It is hilly around here!
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    1. Yes, all recent Shimano rear derailleurs are compatible with 7,8,9 and 10-speed shifters.

    2. Yes. The front derailleur doesn't care what's in back.

  3. #3
    Newbie harishio's Avatar
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    Sweet. Thanks a ton.

  4. #4
    Senior Member demoncyclist's Avatar
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    Oct 2002
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    Medway, MA
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    2011 Lynskey Sportive, 1988 Cannondale SM400
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    1. If you want to continue with 9 speed shifting, you need a set of Ultegra 9 speed shifters. The 10 speed ones will only work if you also change your cassette and chain to 10 speed as well. The derailleurs will be fine regardless.

    2. HillRider is correct, but why change the derailleurs at all? The 105 and Tiagra derailleurs will work with Ultegra shifters.
    DEMON

    Satanic Mechanic
    STAR 3 Spinning Instructor

    2011 Lynskey Sportive (Shimano Ultegra 10s)
    1988 Cannondale SM400 (Suntour XC-M 7s)

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