A storage tank frame assembly for an agricultural implement. One agricultural implement includes a tool bar assembly having a tool bar and row units coupled to the tool bar and configured to deliver flowable agricultural product to a field. The agricultural implement also includes a storage tank configured to hold the flowable agricultural product and to provide the flowable agricultural product to the row units. The agricultural implement includes a frame assembly having a first and a second mounting assembly. The frame assembly is coupled to the tool bar assembly. The agricultural implement also includes an axle removably coupled to the frame assembly and configured to be coupled to wheels for transportation of the agricultural implement. The frame assembly is configured to be coupled to multiple sizes of storage tanks via the first mounting assembly and to multiple sizes of axles via the second mounting assembly.