Wow - Emily! You have some very nice muscle definition
I have almost the same set up as Emily - she helped me decide on shifters.
I don't know that there is a good bar end shifter "option" on the website (which even BF acknowledges as a mess right now). However, our rep was able to order them for us (and they're quite a bit less expensive than STI for what it's worth). Or, was that the question?
The drop bars split in 2 and sort of nestle around the bike in the suitcase.
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