The Shimano EW‑JC130 is a specialized Y‑split Di2 e‑Tube cable used to link two components, typically the front junction and shifters. You connect the single “A” feed into your junction box, while the two branches feed separate components, streamlining wiring in compact handlebar layouts.

Shimano offers this connector in three length configurations (SS, SM, MM). The SS variant features 250 mm and 350 mm branch wires with a 50 mm stem; MM (or “long”) uses 450 mm and 350 mm branches plus the same 50 mm stem. These sizes accommodate different frame geometries and routing paths.