An inline seat post would put the seat mounting above the Post instead of a bit further back- But I would call an inline seatpost a "Non-Standard" item and if required would come into the Fine tuning part of setting up a bike. I attach a pic of my Bianchi- that is the same size as the Giant and as you can see- on this bike I should really get an inline post. Then again on my Tandem I have a Thudbuster Seat post which is a bit different. Once again the Seat is as far forward on the Mounting as possible, but there is no way I will stop using the thudbuster on the T