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Shimano EW-JC304 Di2 SD300 4-Port Junction Box

The 2nd generation Di2 e-Tube wiring system from Shimano has the SD300 designation. These wires and connectors are thinner than the SD50 generation. if you need to join two pairs of SD300 wires to create a longer length for both pairs (4 total wires), you will need this EW-JC304 Di2 SD300 4-Port Junction Box, which is actually a simple looking dual tube connector with internal ports on both ends of each side that accept the SD300 connectors and provide the proper, seamless bridge for the power and data transfer rates of the SD300 wires. Use of TL-EW300 Cable Plug Tool is required to preserve connector integrity as the thinner wires and connectors are more difficult to manage by hand.

Features

  • Straightforward, 4-port junction that joins four Di2 e-Tube SD300 wires to increase length of both pairs without sacrificing power or data transfer
  • Effectively creates an inline connection between each each pair of the SD300 wires
  • Lightweight (5g) and protective
  • Use of TL-EW300 Cable Plug Tool is required to preserve connector integrity
  • Color: Black