External Di2 wire routing leaves gaps where cables exit the frame—small openings that collect road grime and look unfinished. The Shimano SM-EWC2 Wire Cover Set addresses both issues with simple covers that snap over these junction points, sealing out contamination while cleaning up the visual line of your cockpit area.

The set includes two wire covers, which handles the typical external routing setup on most frames. Installation requires no tools—the covers press into place around the E-Tube wire at the exit point and stay put through normal riding. They're sized to work with Shimano's standard E-Tube wire diameter across all Di2 generations, whether you're running an older 10-speed Ultegra setup or current 12-speed Dura-Ace.

These covers matter most on frames where the internal routing terminates near the stem or along the downtube with visible junction boxes. Without them, the transition from internal to external looks abrupt, and that small gap becomes a collection point for sweat, rain, and whatever the front wheel kicks up. The covers won't transform a budget frame into a superbike, but they do eliminate an aesthetic weak point that bothers riders who care about clean builds.... Read More