Rear Pannier Racks - A luggage carrier or Pannier Rack is a device attached to a bicycle to which cargo or panniers can be attached. This is popular with utility bicycles and touring bicycles. Bicycle luggage carriers may be mounted on the front or rear of a bicycle. The rear mount is more common. 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. A common type of child seat designed for carrying an infant on a bicycle mounts to a rear luggage carrier. Some luggage carriers come in more than one size to accommodate different sized frames. A common variation is for there to be a different model for road bicycles and mountain bikes. Rear-mounted luggage carriers are typically designed and tested for a maximum load of 25 kg, some models even for up to 40 kg.