IR-1 speeds the internal frame routing of electric wires, shift cable/housing, brake cable/housing, and hydraulic tubing on carbon fiber, Ti, and aluminum frames. Opposite polarity magnets on cables seek and attach inside frame tubes, making it easy to route through frame entrances and exits. Works with any size frame including tandems Updated to include a dedicated E-tube Di2 cable connector that easily pulls through a 6mm frame hole Compatible with Campagnolo EPS systems with included rubber boot Part no: IR-1.2