Shimano BMR2S1 Di2 Small External Battery Mount

Shimano Di2 External Battery Mounts

• All Di2 components on the bicycle require the same firmware version. Using Di2 components with different firmware versions may cause malfunctions
• For use on frames that have a specific Di2 battery mounting location on the chainstay or down tube
• Compatible with both internal and external wiring kits
• 10mm mounting bolts