When building our dream bike, we don't want to worry about shifter battery life down the road. The Shimano EW-JC304 Di2 4-Port Junction allows us to connect both shifters directly to the battery for 50% more battery life.
Compatibility: EW-SD300;
Activity: road cycling;
Manufacturer Warranty: 2 years;
Manufacturer Part Number: EW-JC304;
storecredits: 0.0;
Style Variants
Available Colors: Black
Size Reference for SHIMANO Di2 4-Port Junction
Available Sizes: One Size













