Shimano Long Size Battery Mount


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  • Attaches to water bottle mounts on the down tube or seat tube of frame
  • For use on frames with external Di2 wiring
  • All Di2 components on the bicycle require the same firmware version. Using Di2 components with different firmware versions may cause malfunctions
  • Use Di2 system checker to update component firmware from

This is a Shimano SM-BMR1-L E-Tube Di2 Long Battery Mount for External Routing.