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  1. #1
    mtbr member
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    Number of gears with Shimano STI shifters

    When a Shimano STI shifter is rated for 10 speeds, can it be used with a 9 speed cassette?

  2. #2
    B A N N E D
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    No, but it can be used with a 9 speed mountain rear derailleur and a 10 speed cassette.

  3. #3
    Positively negative
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    Yes, but you will need a J-Tek Shiftmate in the correct configuration.

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