I added a rack to my Trek FX. I didn't get pannier yet since the bike is new, funds are low, and I really want to give myself a chance to see exactly what I want regarding panniers. Instead I bought a Bontrager Interchange Grocery Pannier. It's not as fancy as the ones currently on the Bontrager web site. It's fairly large, larger than the panniers at the local shop and works very well. Good luck.