Abstract: A push back pallet storage system has a plurality of side members and cross members arranged in several levels, a plurality of carriages for feeding pallets in depth and movable lengthways relative to longitudinal beams fixed to the members, the movable carriages being formed as a substantially reversed U-shaped section member provided with wings with inwardly located rotatable bearings, the section member being configured to surround the longitudinal beams outwardly so that the bearings run inwardly along a lower portion of a web of the beams.