Shimano SM-BMR1 Battery Base Bracket - Short Type - SM-BMR1 Base B Unit
$29.95
SKU: Y7F398040
This is the Mount Bracket for a 40mm Di2 battery. This mount is designed for seatstay or under frame mounting. If you have a long type (bottle holder) battery mount then this bracket will convert it to a short type (under frame).
Please note that this unit does not include the battery connection interface.