Shimano Short Battery Mount External/Internal Wiring ModelNumber=J1621 Color coded easy-to-grip plastic sleeve

Color coded easy-to-grip plastic sleeve even at low temperatures

330mm long and holds 50-80mm diameter (2-3

These bearings feature nitrogen infused stainless steel races that will not rust or corrode paired with Silicon Nitride ceramic balls

} Specifically developed for riding on a home trainer

Shimano Short Battery Mount External/Internal Wiring ModelNumber=J1621 Color coded easy-to-grip plastic sleeveShimano Di2 External Battery MountsAll 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