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Shimano Di2 SM-BMR1LB Battery Mount

The Shimano SM-BMR1LB Long External Wiring Battery Mount is the long battery mount that attaches to the 1st generation external Di2 battery via frame bottle bosses. Battery sold separately. Use this mount for external routing to an external battery. It is e-Tube compatible so it works with 2nd generation e-Tube Di2 external wiring as well.


  • Essentially a longer battery mount that is used with a Di2 external battery on the water bottle cage boss mount used in first generation Di2
  • Rarely used except with older battery/external wiring set-ups
  • For use with external cable routing/external battery
  • Port for e-Tube wiring compatibility
  • Attaches to water bottle mount
  • Weight: 45 grams
  • Shimano part# ISMBMR1LB
Sale Price
Reg Price $134.95
Item is in stock