This item is a frame mount for Shimano's external Di2 battery. The "short" version mounts the external battery close to the frame bosses, typically a perferred location.
- For use on frames that have a Di2 battery mounting location on the chainstay or down tube.
- Compatible with both internal and external Di2 wiring kits.
- Includes 10mm mounting bolts.
- Weight: 30g.