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.
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