A swath roller is attached to a tractor and includes a first frame with two arms each independently connected to the tractor on an adjustable bracket allowing at least up and down movement of the arm relative to its bracket and a transverse bean across the arms. A second frame carries the roller and is supported on a pair of castor wheels spaced outwardly to respective sides of the roller. The second frame includes a front beam connected to the first frame by a center pivot so as to allow side to side pivotal movement of the second frame and two force transmitting members spaced outwardly of the pivot. Conversion to transport is provided by adding a hitch at one end of the frame and an additional wheel behind the roller at the opposite end and by locking one or more of the wheels against castoring.