Today I went grocery shopping with newly acquired "grocery bag" panniers from Nashbar. Early in the morning I made the 2 miler to the market and bought $70 worth of grub. That about filled both panniers. Before I go further I must point out that I am not a neophtye cyclist. I'm in my mid-forties and have been seriously cycling since I was 15 (had dreams of being a Euro-based racer then). I went through college and grad school as a bicycle courier. I have never stopped cycling and thus stayed in pretty good riding shape. Friends, let me confess, those groceries wore my butt out!!!! I have never ridden a bike loaded like that (I used my fixie commuter). Just when you think you know it all, along comes a totally new experience. My commute is 7 or 8 miles with a Carradice nylon Camper. Due to my racing past I am strict roadbike guy. I 've done weekend tours on a fixed touring bike...never "fully loaded" just a Carradice LF Nelson sufficed. This was new and rather exciting. I have a whole new respect for those guys riding loaded tourers all over the world. It seems one uses a different set of leg muscles when riding loaded (so to speak). The great thing is it's another reason not to use a car and have some fun.