Bicycle racks give your bike versatility, it means you can go shopping, commute to work with a change of clothes, or go touring. It's safer and more comfortable to carry weight on the bike, rather than in a backpack. It keeps the centre of gravity low down and means less weight on your hands and bum. A good quality rack will support either a rack pack or, for larger loads, a pair of panniers. Racks which fit directly onto the frame are best, but for full suspension models, seat post mounted racks are also very effective. Disc brakes are also no longer a problem, with more and more brands making disc specific bicycle racks.