hmmm ive been using a bottle tool holder and can just squeeze in a mtb tube (or 2 roadie) , levers , multi tool, patches and a spare piece of tyre – however it doesnt half rattle depending on the position of the above inside the bottle – and i have a big fear over a jump or crash (!) it will pop out and i wont even notice….
i quite like the look of the long frame bags, as it take all the above, plus a pump, so i wouldnt need one on every frame! plus on the commuter it leaves the rear seatpost free for lights…
on all of our other bikes we have 1 saddle bag per bike all TOPEAK each with levers and 1 inner. we always have to swap multitools and pumps…. its a bit of a faf, and the zip pulls usually break off or the clips break at some point….