Originally Posted by Prowler

An alternate idea that has worked fine for me: a tool sack. As I have 8 bikes in current rotation I needed one solution that works on all of them. So I made an easy draw string bag (aka ditty sack) large enough to hold a couple tools, tire levers, tube, pump, nitrile gloves, patch kit, paper towels. This tucks right under any saddle and is quickly lashed to the rails of the saddle with a toe strap. Very vintage. You'll see that I added a "belt and suspenders" line that also ties around the seat post. Very easy to sew. Size it to suit your particular needs. Shoe string for pull cord and tie line. Of course this is not large enough to carry my wallet, cell phone and car keys. Those three never leave my person. In the photo, the first one I made (left) used some cotton canvas like material from the leg of some coveralls that died. The second one (right) was recently made as a spare using material from a torn horse blanket. That was one of the expensive water proofs that horses like to destroy by rolling on the ground. I've not used it yet but will when the first one wears out.