A spreader assembly for a combine harvester is disclosed, the assembly including a pair of disks configured to be rotated such that chaff material dropped onto the disks is spread about the combine harvester, wherein each disk is operably connected to its own motor and a spreader frame assembly. The spreader frame assembly includes a first side support pivotably connected to a frame of the combine harvester, a second side support pivotably connected to the frame of the combine harvester, and at least one disk support configured to support at least one of the pair of disks. The spreader frame assembly further defines an opening configured such that when the combine harvester is windrowing material, no portion of the spreader frame assembly interferes with the flow of windrowing material.