My TT bike weighs 19 lbs 8oz with the Zipp 404 clincher Ptap set. Just sayin'. I can get it down under 18 lbs with the Zipp 404 tubies. Those TT bikes aren't light with all that handlebar plumbing. The S2 is 17 lbs even with the Zipp Ptap wheels, 15 lbs, 3oz. with the Zipp tubies. Either way that's light enough. The Scott is 15 lbs 14 oz with the DA clinchers. The Ibis Ti Road is about 18 lbs with a front fender. The Fly Ti MTB is about 22 lbs.
There, now you know what my bikes weigh. I hope you're all happy. Don't ask me again, I'm only telling you once.