Shimano adapter that connects a new-generation EW-SD300 Di2 wire to an older EW-SD50 wire, so first- and second-generation Di2 / STEPS parts can work together.

• Port 1: EW-SD300 / EW-SD300-I (3.45mm plug)
• Port 2: EW-SD50 (5.1mm plug)
• Lets older parts (e.g. ST-R9160/ST-R8060 TT shifters, MU-UR510) work with 12-speed Di2 systems
• Also used in STEPS e-bike wiring (DU-EP800/EP801/EP600)
• Colour: black
• 1 adapter; Shimano part no. I-EWAD305