Abstract: An agricultural header assembly broadly includes a header and a header transport assembly. The header is disposed in a transport orientation when a rigid beam thereof is out of vertical alignment with the header center of gravity. The transport assembly includes first and second pairs of spaced apart wheels shiftably connected to the rigid beam for movement between a transport position and a field position. The first and second pairs of wheels define respective first and second midpoints therebetween when in the transport position. The first and second midpoints are each disposed in general vertical alignment with the header center of gravity when the header is in the transport orientation to substantially balance the header on the transport assembly.