A trailer for transporting a commodity includes a tank defining a chamber that is configured to receive the commodity and a discharge hopper located vertically below the chamber and configured to receive the commodity from the chamber. The discharge hopper includes a trough wall that at least partially defines a channel and the trough wall has a middle wall section and a side wall section surface on each lateral side of the middle wall section. Each side wall section is vertically located above the middle wall section. A floor auger extends in the channel and configured to convey the commodity toward the rear end. A hanger suspends the floor auger relative to the channel, and the hanger having a first hanger arm that couples to one of the side wall sections and a second hanger arm that couples to the other of the side wall sections.