Di2 ew rs910 e tube framebar plug mount 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 this junction a is required to connect the shifters via e tube wires to the down tube junction wire for either specific frame mount or handlebar end plug mount 2 port design battery level indicator feature e tube ew sd50 wires not included additional charging poin