I don't notice the wire anyway so I don't worry that it is not completely hidden. The wire up from the hub I wrap the fork. The wire back to the rear I run along the brake cable under the top tube and then under the rear rack attached with tiny zip ties. If bike companies ever get on the ball they could design a bike that is internally wired with all assortment of jacks and plugs and things for electronics. Someday when they figure out it is not all about racing and extraordinarily expensive components that most people could car less about maybe they'll prioritize truly useful bike design.