Does it have to be a handlebar bag? The tour that I did specifically recommended AGAINST handlebar bags in favor of seatpost bags. Apparently, handlebar bags make the bike a little less stable than a seatpost bag. For long rides, I've got a Jandd (sp?) seatpost bag that has an expandable bottom. I've fit a pump, patch kit, cellphone, levers, spare tube, inhaler, gels and bars, a bagel AND a rain jacket in mine!