Saddle bag (or another option) for road bike with carbon seat post?

[colby]

I guess I'm not understanding why a regular normal underseat bag won't work with your carbon seat post??? I have a carbon seat post...infact, it's not even round, it's tear-drop shaped and my medium-size Topeak aero wedge bag works just fine with it.

Here is a link to the bag I use:

http://www.topeak.com/products/Bags/..._medium_Velcro

I have the same bag, except not the velcro version (I think it's the medium, not the small), on both my road and tri bikes:

http://www.topeak.com/products/Bags/...k_medium_Quick

On my tri bike I have to bend the pack to fit against the seat post, it's just a little wrongly shaped (the small/micro might fit better but holds less). I can fit (carefully arranged like puzzle pieces) 2 tubes, a co2 inflator, 2 or 3 co2 cartridges, tire levers, valve extender, and patch kit. It fits 1 tube much more comfortably, but I always cram in 2 for Ironman and just leave them that way.