Originally Posted by
BarracksSi
Fixed by:
1) Setting the panniers farther back on the rack,
2) Using a rack with more setback, or
3) Using a bike with longer chainstays and is intended for carrying panniers.
There's also option D,

which is a set of panniers that can be set at an angle. I saw a sales rep at my LBS showing them off, but I forget what brand they were.
Point is, for every problem we encounter, somebody else with engineering and marketing savvy has come up with a solution and is selling it.
Here is the deal. I have only one bike in my "stable"---it has to do all things. I bought a Giant Rapid, and the chain stay is shorter, so my panniers kept hitting my heels. I could not do suggestion 1---I tried it, to no avail. As for suggestion 2, I was happy with the rack that I have, and the very nice trunk rack, as well. And, in regards to suggestion 3, I am not about to go out and spend more money on another bike---right now, my budget is directed at other endeavors. I also was tired of taking the panniers off when I wanted to go out on the Ohio Canal Towpath or riding with my wife---so, I simply bought a nice backpack. Problem solved.
While I am not an engineer, (I teach English, Speech, Debate, and Cinema), I do believe I solved my problem in the best manner FOR ME.
Besides, am 55 and have had bilateral knee replacements. I feel that I am faster with the backpack, but speed ---well, when you are 55, that, to me, is not my primary mission; enjoying the commute or the ride, is.
Tim C.