you will probably laugh, but I have a couple of "bell" bags that I got from walmart, one is a handlebar bag and the other is a wedge style bag. I carry a couple of tubes, patch kit, multi tool, tire levers and have room for wallet, keys, and miscellania like moist towelettes for cleaning oil, chain breaker, spoke wrench... these bags are lightweight, low cost, durable, hang using velcro. never had a problem with them. You can fit what you need (my list) in only the handlebar bag (as its got nice amount of room) but I had the wedge bag before I found the handlebar bag...