My Propel Advanced (as referenced here viewtopic.php?f=3&t=134732
) came in at 1019 gram for a size ML, this weight includes the rear mech hanger but not much else (no headset, no front hanger, etc). Fork was 420 grams and seat post was 261 gram, I'd guess both are significantly lighter on a SuperSix.
Thanks! That's not bad at all! But yeah, I think in my size I'd look at around 300g extra in the case of the giant. I think I won't go down that road. Just for the looks.
Ride them both... I was able to get an equivalent Tarmac sl4 pro or Supersix Evo for the same price and decided I liked the tarmac better (despite *wanting* to like the Supersix more, it's lighter!)... The handling on the Supersix just doesn't feel as responsive and I didn't feel "connected" to the road. Everything just felt dampened on the Supersix, especially during sprints, it felt like I was sprinting on a mushy wooden bike. The tarmac was much more responsive to steering input (some might call it "twitchy"), I felt connected to the road, and was super stiff. I ended up with a Venge (the previous model) because they were sold out of tarmacs in the model I wanted in my size and it handles and sprints nearly identically. I could not be happier, I just love the feel of the bike. Another thing to consider is your tolerance of discomfort, for instance the aero seat post on my Venge definitely makes my bike pretty stiff/sore on really long rides (probably because Ohio roads are so torn up).
I have not ridden a Propel, but I would suggest riding both bikes to see if you like the way one rides better. For me the difference in bike feel between Specialized and Cannondale was more important than grams saved. If you don't notice a difference also remember that the aero seatpost on the Propel is unlikely to be as comfortable, which will be noticeable on longer, bumpier rides. Finally, take into consideration what time of rider you are... Are you a climber who wants a really light bike to float up the hills or a sprinter or breakaway guy who wants an aero advantage? The nice things about both bikes is that either can do it all. The Propel adv frame will probably be ~300g heavier, it is only the SL frame with ISP that is super light.
Well, my problem is that I'm a short guy and specialized doesn't fit me well. I prefer longer stems and the smallest tarmac has a 380mm+ reach, so I'd have to use a 90-100mm stem. I have a caad10 and I love it, so I think it's logical to give the supersix a try. I don't really care about comfort or aero. My main concerns are look, weight and fit.
Based on the weight, I think I'll test ride the supersix.