Comes with removable aftermarket mounting tab, may or may not be useful for your setup.
Older Di2 setups running the SM-BTR1 external battery can gain wireless E-Tube connectivity and Synchronized Shift functionality without replacing the whole system, and this is the piece that makes that upgrade happen. The Shimano BM-DN100 Short Battery Mount isn't just a bracket—it's the master unit that adds Bluetooth communication to a Di2 drivetrain that predates the wireless era. The short version is the one to grab when the downtube real estate is tight or a longer mount would crowd the bottle cage or bottom bracket junction.
Need (or want!) to return a product? No problem! US returns can be made for free within 60 days of purchase for any reason as long as item is in the same condition as received. US customers will receive a return shipping label and will be refunded the full order amount once the item is received.
To file a return, simply login to your account and select your order to file for a return. We will get back to you with a generated shipping label free of charge and will refund the payment as soon as the item is returned to us in undamaged condition.
You can always contact us for any return question at cs@ejrecyclery.com.
Note: Items that were marked as-is/for parts and/or do not have the red EJR 60 Day free returns display are not eligible for returns.
Note about purchases from eBay: Purchases made from our eBay store have the same return policy, but you will need to file for returns made there directly on eBay.
European Union 14 day cooling off period Notwithstanding the above, if the merchandise is being shipped into the European Union, you have the right to cancel or return your order within 14 days, for any reason and without a justification. As above, your item must be in the same condition that you received it, unworn or unused, with tags, and in its original packaging. You’ll also need the receipt or proof of purchase.
