I commute on a Trek 7.3fx wsd. I have the Trek grocery panniers and they carry everything I need. Papers, books and even groceries. I live in a small town, so I commute to school, (I'm a teacher) then the post office and if I need to the grocery store. These panniers hold it all and are sooooo easy to use! Just drop the stuff in. This bike also has tires that are resistant to flats. I try not to use a car for anything that isn't out of town. Everyone always asks me how many miles to the gallon I'm getting.lol. Gee, I don't even notice the gas prices...