The Di2 SM-BMR2 Battery Mount secures the SM-BTR2 battery to your frame. It's available in two lengths, Long and Short.
The Long version is installed to the seat tube or down tube via a single water bottle boss. The Long mount is available in internal or external variations depending on which cable routing your bike uses.
The Short version is designed for Di2-specific frames that have a battery mount separate from the water bottle bosses. The Short mount can be used with either internal or external routed cables. The Di2 SM-BTR2 Battery and electronic wire ares sold separately.
Note: This product is also back-compatible with Ultegra 6770 Di2 but requires component firmware updates. You will need the SM-PCE1 PC Tool to install these updates, which can be downloaded at http://e-tubeproject.shimano.com. Alternatively, the most recent firmware can be installed at your local Shimano Service Center.
B-Stock - This product has one or more B-Stock units available. These units can be purchased at a discount (see option select). B-Stock units were returned from other customers and may have missing or damaged packaging materials. These units are otherwise as new. The full manufacturer warranty applies. Click Here for more information.