There is a lot of lying about the weights. Peter Sagen's bike weighs and that's important Ready to ride 7.33 kg My Velobuild weighs exactly the same size 7.49 kg. There are 50 mm high rims on it.
I only believe the 7 kg when I see an exact listing
you gotta factor in the mount, pedals, ect. i can see a few ways to shave a couple grams. one, lighter pedals. the 9100 pedals are 228g listed and you can probably shave some if you run time or look carbon keos, speedplays, while equaling weight to the system, bike weight is less. pm adds a tiny bit of weight, 140mm stem is freaking long, normally its like 110-120. mirror evo is 185g, which you can find seats for 100-125 and youre very comfortable on. so its listed at 6.8kg out of the box, but 7.1 is more realistic ready to ride. frames 800g for the sl7. its 1050 or something from velobuild? fork and seatpost are gonna be less and more respectively, so probably looking at 325-350g difference in frame weight. 51/60 wheelset so 55-56 weight, which is gonna be 1500g from any wheelset company from china, so thats like 100g there extra. also his bike is duraace di2 and yours is red etap, which red weighs more, like 150g maybe?