The listed weight for that bike is 18.74 lbs. If you have a small size it might be lighter. Realistically you need to shave 3 lbs to get to your goal. The wheels list at 1943g so if you get some 1300-1400g wheels you can loose a pound. If you upgrade handlebars, brakes, cassette, tires, tubes, stem, saddle and seatpost you might buy another pound. If you want to get to 16 pounds or lighter you probably need to upgrade to DA or Red components