Shimano BM-DN100-L Di2 Long Size Battery Mount Description:

Shimano Di2 External Battery Mounts are intended for use with Shimano SM-BTR1 External Batteries when setting up Bluetooth shifting solutions.

Features:

• 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 http://e-tubeproject.shimano.com/

This product was added to our catalog on July 21, 2025