I ride a large OCR2 and wear size 13-14 shoes depending on brand. I use toe clips, and I realize that puts my feet a bit further back on the pedals, but it never occurred to me to wonder if panniers would fit without my heels striking them.
Well, they don't. Fit without getting smacked, that is. I got the $24.99 set from Nashbar to see if I liked the idea, and I was impressed with how nicely they mounted to my Pyramid rack, but I can't stop hitting 'em.
I usually ride in a pair of cross trainers with a very big, wide sole at the heel, and since I just brush the panniers it probably wouldn't happen if I wore cycling shoes and/or used clipless--but I don't want to do that right at the moment as I'm still learning to pedal with my feet attached to the bike and I like being able to hop on in street shoes and go.
Are there big differences in panniers? Will some mount further back, or not extend so far forward, or am I stuck? It's not a huge deal, but it's disappointing. I was looking forward to getting some stuff off my back.