Railcar mover having negative cambered rail wheels

In a vehicle designed for alternate travel on a roadway or railroad rails, said vehicle including a frame, a set of wheel assemblies oriented for engaging said roadway during roadway travel, and for engaging said rails during railroad travel, a set of rail wheel assemblies each having rail wheels including an upper end a lower end and an inner margin, and a rail wheel shifting mechanism operable to move the rail wheels between a tracking position in engagement with said rails for said railroad travel, and a retracted position for said roadway travel, the improvement which comprises a mounting assembly for at least certain of said rail wheels serving to orient the rotational axes thereof at a predetermined oblique angle relative to the horizontal when said angled rail wheels are in said retracted position thereof, and, when said angled rail wheels are in the tracking position thereof, the angled rail wheels are oriented with the inner margins of the upper ends of the rail wheels inboard of the lower ends thereof adjacent the rails;

• wherein, said angle is less than 6°.