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Using Shimano SW-R9150 (the new remote switches) on the bullhorns
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I've been running Di2 on my TT bike for the past 7 years, but except for brief usage of the older climbing switch (SW-R610), never had the ability to shift on the bullhorns. Dan wrote an article about this almost four years ago, mentioning that someone was able to append the remote switches onto bullhorns, so that one can use other brake levers (image below shows the set-up).



I'm wondering if there's anyone who could provide a comparison between these and the integrated shifters (e.g. ST-R9071 shifters) on bulkiness of the respective set-ups.

Many thanks in advance
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Re: Using Shimano SW-R9150 (the new remote switches) on the bullhorns [echappist] [ In reply to ]
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Check out these bar-end shift buttons. They are super clean and simple.

https://bike.shimano.com/...50-di2/SW-R9160.html
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Re: Using Shimano SW-R9150 (the new remote switches) on the bullhorns [exxxviii] [ In reply to ]
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exxxviii wrote:
Check out these bar-end shift buttons. They are super clean and simple.

https://bike.shimano.com/...50-di2/SW-R9160.html

Thanks, but those are for bar-end / extensions, not bullhorns
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Re: Using Shimano SW-R9150 (the new remote switches) on the bullhorns [echappist] [ In reply to ]
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Doh, sorry. I failed to follow what you were asking and answered the wrong question.
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Re: Using Shimano SW-R9150 (the new remote switches) on the bullhorns [exxxviii] [ In reply to ]
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No worries. All good :)
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Re: Using Shimano SW-R9150 (the new remote switches) on the bullhorns [echappist] [ In reply to ]
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Picture is of a SRAM setup, sorry!

Easiest solution for Shimano is to run the "smart" sprint/climbing switches (SW-R9150) aft of whatever brake lever you have on the bike. Winds up being a bit more svelte than the Shimano brifters, but button placement probably isn't ideal for most folks (similar to the SRAM in the pic).

For DI2, you need to have a logic chip in the circuit to translate the button click into a signal the derailleur can read, so while you can MacGyver something different, it's significantly non-trivial. You can add another set of switches in parallel to the ones on your extensions, but that involves cracking them open and doing some soldering. It's also possible to pull the logic guts out of an existing Shimano switch, and then wire whatever switch you want in to the circuit.

Tech writer/support on this here site. FIST school instructor and certified bike fitter. Formerly at Diamondback Bikes, LeMond Fitness, FSA, TiCycles, etc.
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