Originally Posted by
rpenmanparker
Even if you figure the very low weight of 150g for an added-on seat post (Thomson Masterpiece is 158g) you save 100g or so with the ISP approach. That's a fact which might not matter to you. Fair enough. But it is a fact. Yes, other makers may offer lighter frames without ISP. Just saying that if you choose the Giant TCR Advanced SL, you save weight with the ISP version. Like I said, two kinds of people. No use arguing about it.
Sorry, but the weights in that chart are BS. I bet the weight for the ISP frame doesn't include the topper. Also, to put a 250g seatpost on a premium frame like that, well, it reminds me of Giant sales propaganda. Where did you source it?