The Shimano EW-SD300 is an E-TUBE electric wire that carries power and data between connected Di2 components. This version is for external routing.

• For external routing (not the cable-tie type)
• Compatible with 12-speed road Di2 (e.g. R9200 / R8100) and EP8-series e-bike systems
• SD300 plug at each end (cord diameter 2.4 mm, plug 3.45 mm)
• Smaller, lighter connectors than the older EW-SD50, ready for future Di2 capabilities
• Colour: black; available in lengths from 150 to 1600 mm
• Some setups may need an EW-JC304 junction