Eigendlich I wanted my bike not spoil with a tool kit, but then I stumbled across this one and ordered it to me immediately. Then the first shock, bag does not fit on my SQLab 612 because it has a cross brace at the rear end. I on my part training bike a SQLab 611 have which manages without this brace, I have swapped the fixed calipers and the bag mounted, went super fast and easy. Is firmly under the saddle, because nothing wobbles and makes no disturbing noises. I have room for 2 hoses, tool tool, CO2 pump with 2 additional cartridges and even a small Medi Pack. Clear recommendation from me, only listening on a quest outdoors saddle.