Shimano ultegra 6800 polymer inner brake cablepolymer wrapped stainless steel inner brake cable for the ultimate in smooth braking performance features the polymer wrap is applied in a spaced spiral formation around the stainless steel inner wire providing excellent support for the silicon grease and reducing the surface contact of the inner wire on the outer casing the polymer wrap is applied to precision ground round inner wires all combining to create a smooth low friction braking action wit