Originally Posted by
merlinextraligh
Giant at least has the seatpost clamp covered. You can choose the amount of offset, 10mm or 23 mm, and you can angle the seat as you like. On my 2007, it was not the easiest seat post clamp to adjust, but you could set it up as you wanted, and once done it stayed where you put it.
I'm not advocating for ISP's here. There's a small advantage and some tradeoffs. I just think the downsides tend to be oversold, and I wouldn't rule out buying a bike like a Giant Propel Advanced SL, or TCR Advanced SL because of the ISP.
That said, I didn't replace my TCR Team Advanced with a bike with ISP.
Edit: after I posted, it dawned on me about your point on saddle rotation. If you want your seat off line, that would be an issue. However, I thinky you've got the same issue on any aero seatpost frame. I know you can't rotate the seat on my P2.
Points taken and tech continues to evolve and believe the engineers at large companies are stepping up with good 2 bolt seat post clamps on TT bike ISP's in particular. Giant has a pretty good seat post clamp...same with Cervelo if stuck with a proprietary 'aero' seat post.
It is just a peeve of mine being an initial fan of early carbon Look bikes...Look being a pioneer of carbon and offered some of the best carbon bikes in the world. Other companies now have stepped up if not passed Look in their technology. To me and btw, not unlike BB30, the downside exceeds the upside with ISP. I see this as almost a parallel. Both have each without question and why ISP's came into being. But the trend away is telling. I also believe there will be a trend over time away from BB30 as we know it. Tech will continue to evolve and we are all the beneficiaries.