Originally Posted by
Homeyba
How would it do that? One could argue that a seatpost rack might do that but not a Carradice bag. Either way it doesn't matter too much. Carbon seat posts don't really offer much over aluminum ones.
I have the bag fixed to the seat post, rather than e saddle, using one of their SQR brackets. Makes it very easy to take it on and off, and carry it around when necessary. I was persuaded that in cornering and climbing the bag would swing somewhat and apply a degree of torsion to the post. It may be marginal, but I decided to err on the side of safety and as you say, I don't lose much.