An agricultural header includes: a header frame; a cutter carried by the header frame; a steering assembly coupled to the header frame and including an axle; and a transport assembly coupled to the header frame. The transport assembly includes: a first arm coupled to the header frame and movable between a first transport position and a first operating position; a first wheel mount pivotably coupled to the first arm; a second arm pivotably coupled to the header frame and movable between a second transport position and a second operating position; a second wheel mount pivotably coupled to the second arm; and a linkage reversibly coupling the first wheel mount to the second wheel mount and coupled to the axle such that the second arm is movable independently of the first arm when the linkage is uncoupled from at least one of the first wheel mount or the second wheel mount.

A header for a crop harvesting machine includes front and rear wheel arrangements that pivot about respective upright axis between a field orientation and a perpendicular transport orientation, while having respective suspensions arrangements movable between different suspended heights. A biasing spring provides lift assist to carry weight of the wheel arrangement during adjustment of the suspension elevation while being isolated from the suspension once set at any one elevation. The front wheel arrangement includes an anti-rotation latch that locks the front wheel in the field orientation automatically upon disconnection of a hitch arm. A second wheel of the rear wheel arrangement can be held in a raised position relative to a first wheel in a field orientation. Load bearing surfaces between the suspended rear wheels and the header frame abut one another when latching to the header frame to isolate the suspension from the header frame in the transport orientation.

In one or more arrangements, a trailer system is presented. In one or more arrangements, the trailer system includes a front wheel assembly having wheels and a rear wheel assembly having wheels. In one or more arrangements, the wheels of the front wheel assembly turn when the trailer is performing a turn and the wheels of the rear wheel assembly turn when the trailer is performing a turn. In one or more arrangements, the trailer system is configured to support an agricultural implement.