The SM-BTC1 mounts Shimano’s SM-BTR2 on a bike’s water bottle bosses and also acts as a Junction B, connecting wires from the shifters to the battery and derailleur.

Features

SM-BTC1 mounts current sm-btr2 battery externally next to bottle cage

Low profile design mounts toany frame with bottle cage mount

Junction b function

Six e-tube wiring ports with cable organizer

Clean appearance thanks to internal wire routing

System expansion thanks to e-tube platform

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