Sorry if I came off as not beliving you but at first glance I thought it was an al frame.
If I were to just add all my components and frame my bike comes in, minus computer, at 15.11. Weight at the LBS on a digital scale it comes in with computer at 17.9oz. I found the same to be true of my LOOK. When I did the build at WrenchScience to check the weight it was 16.4oz but that bike came in at 17.5oz on digi scale.