Originally Posted by
Inpd
Everything comes back to the Venturi (Praise be to God)!
I should have mentioned how I measured the bike. I measured it the standard way manufacturers do which is sans pedals (I know I listed them by mistake), sans bottle cage, pump, computers all that extra stuff.
I think there are possible a few other differences. The frameset (including frame, forks, headset and stem, essentially everything in the box) comes in at 5.75 pounds. Mine is definitely not MY'12 since the lettering is different. Perhaps its something else like the fork not the frame causing the difference?
I never actually weighted the 5800 groupset parts separately I got the total number from this website
2015 Road Groupset Weights - The Bike Lane so that part maybe over-stated.
We're both working with the same limitations in regards to weighing stuff. If I back out the "bits" (i.e. pedals, cages, mounts, sensors), that puts mine at 18lbs on the nose.
It would be easy/inexpensive to spec lighter bar tape and saddle, and probably seat post, too, in order to shave around 90gm and go 17.9 or so.
Anyway, if ours are the same size, and the estimated 1.7lbs variance in spec is not there, then yeah, we have to look at frameset differences. Seems unlikely, but it's possible.