Shimano EW-SD50 E-tube Di2 Electric Wire 250mm

The removal of traditional mechanical cables in favour of electrical wires not only eliminates poor shifting caused by contaminates; corrosion and stretching; but provides effortless gear shifts. The Shimano EW-SD50 E-tube Di2 electric wire; 250mm connects the junction (either SM-JC40 external or SM-JC41 internal) to the rear mech; front mech; battery and to the handlebar battery indicator junction box.