Rear Derailleur Battery Shimano Di2 BT-DN320 partsshimano However you wear it

However you wear it

Prevents premature ring and chain wear that can come from non-optimized profiles

and with increased puncture protection

Shell: 100% Polyester

Rear Derailleur Battery Shimano Di2 BT-DN320 partsshimano However you wear itRear Derailleur Battery Shimano Di2 BT DN320 Full wireless technology means an all new battery. The BT DN320 fits snuggly and protected within the new wireless XTR rear derailleur and powers the fast and smooth shifting XTR is known for. Features Protected Battery: Tucked safely inside an enclosed space, the battery wont budge even in rough terrain, while remaining completely removable for charging. Longevity: 305 mAh provides for more riding on one