Ridg-U-Rak’s Push Back systems offer storage density with improved selectivity and accessibility. Product rests on a system of carts-on-rails up to 6 pallets deep. From one aisle, pallets are stored by “pushing back” stored pallets and placing the new load on the next cart position. Retrieving a pallet causes each subsequent pallet to move forward. Ridg-U-Rak’s patented design features large coated wheels with sealed bearings. The linked cart design provides smoother operation.