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Shimano EW-SD50 Electric Wires for Di2 and E-Bike systems
Available in lengths from 150 to 1600mm, the SD50 E-TUBE wire transmits interactive signals and provides power to E-TUBE DI2 drivetrains.
With a compact, waterproof connector, it can be easily routed internally in handlebars and frames thanks to its "plug & gap" connection.