I am planning a short bike tour and I want to take my folder with 20" wheels. I tried to put a pannier on my GreenZone and I notice that I hit the bag with my heel as I pedal. I tried to put the panner as far back as possible, and it helped but I am concerned that this might still be a problem. Can I mount a front rack? I heard that most of the weight of panniers is supposed to be on the back of the bike to help with stability. I could get a trunk, but how much can you pack in them? Any suggestions? Help, I leave in two weeks!