Originally Posted by
Jiggle
Actually, I do.
The lightest ISP topper I can find is the New Ultimate at 81g. That chart expects me to believe that the extra carbon for the ISP attached to the frame AND the topper only weigh 48g more than the frameset without a seatpost?
That is ridiculous. Giant is lying on that chart, and
they are well known for outright lying on weight numbers.
Roadbike.de weighed a medium TCR Advanced ISP at 996 g. Add 100g for a topper and that's 1100g. Not impressive. Certainly no "weight savings", lol.
I think we can agree, that at least in Giant's case, weight savings is not a selling point for their ISP design.
I agree - weight saving doesn't come from the ISP design - there'll be a bit of savings from the frame - a higher grade carbon. But most of the savings will be from the better components that Giant will provide for the SL (ISP) model.