I drove all over France with this bag Tent in it and my tools plus litre bottle of water on the rubber bands Just fine. Now bought a new one for my cycling buddy
A handlebar bag, or a saddle bag after all? using Mantel's decision aid, I ended up with the Topeak Backloader, the 6l seems big enough to replace my rucksack for sandwiches, fruit and other commuting equipment. The first ride was top, the 2nd wet and then it turns out it doesn't act as a mudguard, so I snapped my plate under it and the 3rd ride was top and wet.
Fine backloader where you can put enough in for a multi-day cycling trip, provided you don't go camping. It is easy to assemble and of good quality. I did notice that the bag tended to hang down. However, this is easy on the loose by securing the straps along the top and crosswise instead of along the sides. For a multi-day trip through the Eiffel, it held up well.
Super nice bag! I cycled to Paris with it last week, and everything I needed fit in it. The bag attaches well to the bike and you have as much balance as normal. The bag stays up well and even a pair of sneakers and sandals one could be attached on top.