Which Di2 Systems Use the Shimano EW-SD50 700mm eTube Wire?

The Shimano EW-SD50 is the Di2 E-Tube wire for older-generation Di2 systems, compatible with both internal and external routing configurations. At 700mm it suits shorter routing runs for derailleur connections and junction-to-component wiring on Dura-Ace 9070, Ultegra 6870, 105 R7070, and similar pre-12-speed Di2 groupsets. Unlike the current EW-SD300, the EW-SD50 can run through both externally routed and internally routed frames, providing flexibility for the wide range of older Di2 bikes still in service. Correct wire length matters for a clean Di2 installation -- too short and you get tension at connectors, too long and wire management inside the frame becomes difficult.

700mm length. Internal or external routing. Compatible with pre-12-speed Shimano Di2 systems using the EW-SD50 format. Not compatible with current 12-speed Di2 systems using EW-SD300 wires without an adapter.