Hey guys! Thought you may be able to help me with a problem I have been having with my Ortlieb rear panniers on my OMM Pioneer rack. To start off, I have used the correct shims and I have played around with the bottom clip thing for hours to no avail. I recently did a tour in Cameroon. On smooth asphalt and mild dirt roads, the panniers preformed perfectly. Never came off, very solid. The second I hit very rough roads and trails, the bags would come off on the bottom. They would stay attached on top, but the bottom would detach from the rail and bounce all over the place. On really bad roads, this happened every 5 mins. Extremely annoying and I was always worried the bag would tear or something. Again, the bag was on there really well, and it never came off on mild dirt roads, but the second I hit trails and rough roads it would bounce off. Anybody else experience this? Does Ortlieb sell anything to combat this? Anybody try tying the rack to the bike or something?