Ultegra SL Rear Derailleur
#1
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Ultegra SL Rear Derailleur
Does anybody know if the new Ultegra SL 10 speed Rear Derailleur will work on a 9 speed casette and 105 shifter ? Thank YOu
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#7
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The reason it will work is that derailleurs move continuously through the range of motion allowed by the hi and low set screws. It's the indexed shifter that determines how far it moves per click. The important match is between the shifter and the cassette.
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+1. Perfect explanation.
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