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Which Di2 Systems Use the Shimano EW-SD300 650mm eTube Wire?The Shimano EW-SD300 650mm is the shorter internal routing wire for current-generation 12-speed Di2 systems, suited for rear derailleur connections, junction-to-derailleur runs, and shorter routing sections within the frame. The EW-SD300 uses a smaller diameter connector than the older EW-SD50, designed for the tight internal routing channels in modern carbon road and gravel frames. Choosing the correct length keeps the Di2 installation clean. Excess wire coiled inside the frame creates noise and complications during assembly. Measure your routing path carefully before selecting a wire length. Compatible with Shimano Dura-Ace R9250 and Ultegra R8150 Di2 12-speed systems. Internal routing only. Not compatible with older Di2 systems using EW-SD50 wires without an EW-JC200 junction adapter.
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🇺🇸 Ship from USA · On Agora since 2026
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