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  1. #1
    Louisville, KY - CX
    Join Date
    Nov 2007
    My Bikes
    Trek 7.5 FX modified for CX
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    Shifter compatibility questions

    I'm transforming a hybrid into a cross bike, and my next step is the bars. Before I can take it to my LBS for drops, I need to get some shifters, which I simply can't afford new (wish I could). The bike I have is a TREK 7.5 FX, which has Shimano components. It is a Triple front, 9 rear setup, and I see all kinds of options on eBay for slightly used and new shifters, but I want to make sure I get the best I can get, that will be compatible, for the best price.

    Can someone help me understand the difference between:

    Shimano 105 5500
    Shimano 105 5510
    Shimano 105 5600

    Is one model better, or just a newer series? Better materials, or more durable? I may have even seen a 5501? Which should I get if I have the option? Are all compatible if I see one that is just way cheaper?

    What about Dura Ace and "FlightDeck" compatible?

    Do I have to get a 9 speed shifter, or will a 10 speed shifter work with a 9 speed rear cassette?

    I assume I MUST have a Triple front shifter.

    THANKS!!

  2. #2
    Senior Member
    Join Date
    Feb 2005
    Location
    Oklahoma
    My Bikes
    Trek 5500, Colnago C-50
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    If you run 9-speed, get the 9-speed shifters. Shimano 105 is 55xx, any will work, double or trouble. Shimano 10-speed is 56xx, any will work with 10-speed cassette, and 10-speed chain. Flight Deck shifters have buttons and wires to work with their proprietary computer with gear combination display. Dura-Ace components are the top-of-the-line Shimano. D-A shifters are double/triple specific, the double shifters won't work with a triple.

    Al

  3. #3
    Senior Member
    Join Date
    Dec 2004
    Location
    Athens, Ohio
    My Bikes
    Custom Custom Custom
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    the 55xx series is 9 speed and are not double/triple specific. the 56xx series is 10 speed and not double/tripled specific.

    Yes you can get a 10 speed shifter and run it with a 9 speed cassette using the alternate cable anchor.
    http://www.sheldonbrown.com/derailer...html#alternate

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