The topeak rx dual side frames are clip on pannier supports designed to be used to accompany the popular topeak rx beam racks they are constructed from tough 6061 t6 aluminium and are easily attached to any topeak rx beamrack in seconds they will support any topeak trunkag with a fold out pannier attachment to ensure you have maximum stability when you39re riding features tough 6061 t6 aluminium construction attaches to topeak rx beam racks in seconds weight 200g tope