Originally Posted by
GeneO
I use the Topeak 1/2 liter micro bag that clips in. I use 1 bag for all bikes, I just clip it out of one and onto the other. The only thing I need different is the quick connect links 910 vs 11 speed), so I carry both. I use the same tire size on both of my bikes, so would have to swap the tube if that changes. I also have a larger Topeak bag if I need it, but I haven't used it in a long time.
I wanted to do a system like this but couldn't find (at the time) anyone who was selling just the mounts, aside from buying the whole bag.