The Carradice Bagman racks are rather expensive, but make the bags much more usable and convenient. Without the rack, my Barley bag hits the backs of my legs on every peddle stroke and sways a lot. The quick release feature is also very nice, so you can quickly mount or remove the bag. I bought mine direct from England, so prices were much less than US dealers, and picked up another one used for a good price. You can buy all Carradice products direct from their website in England, and they have much better selection and prices than other outlets, and shipping costs are very reasonable.