The expansion plug with a cap + battery holder Di2 PRO is designed to mount the battery in the steerer tube.
CHARACTERISTIC
- Expansion mushroom with cap and SHIMANO Di2 battery holder
- Replaces the traditional rudder cover
- Fits 1 1/8 inch steerer tubes
- Version available for all stems (PRHS0110) and for the PRO Tharsis Di2 stem (PRHS0111)