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  1. #1
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    Shimano SL-BS78 (10sp) barend shifters compatible w/ 9sp in indexed mode?

    I'm looking at Paul Thumbie adapters and a set of Shimano bar end shifters for a mtn build. I've learned that the newest 10sp bar end shifters (SL-BS79) are index only. The SL-BS78 version is 10sp and both indexed/friction.

    I was hoping to run a 9sp rear der. and cassette with the option to go 10sp if/when I need to. Is a 10sp shifter like this compatible with 9sp in indexed mode? I'm pretty sure friction mode will work but I want the indexed shifting. If not, I'll have to look around for a set of BS77 shifters.

    Thanks!
    Ventana El Rey
    Felt F35
    Schwinn High Plains

    Project - Surly Ogre

  2. #2
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    The 10 speed bar ends will work indexed with a 9 speed rear derailleur and a 10 speed cassette. You have to change the cassette.
    Road shifters/derailleurs did not change between 7-8-9-10 speed so 9 speed MTB rear derailleurs have to be used with 10 speed road shifters.

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