I haven't tried them but I notice that their capacity is 1450 cubic inches for the pair. The Sunlite 1 panniers I just replaced with monstrous Artek panniers hold 1678 cubic inches and I loved them. Ignore the comments about the attachements not working well. They worked fine and in fact I never used the tied down hook on the bottom because they stayed on so well. AND they are only $27 for the pair! If you need more room without the panniers being too big, I'd go with the Sunlite 1. I could stuff a week's groceries (for 1 person, 2 dogs) in the Sunlite with no problem.