The present disclosure provides a transformable agricultural planter that is structured and operable to transform to a Transport Configuration wherein a width of the planter is less than or equal to a Department Of Transportation maximum load width for which special ‘Wide Load’ permits are not required. The planter includes a support cart including a telescoping support axle having a plurality of wheel assemblies mounted thereto and a plurality of actuators connected to the telescoping support axle. The actuators are operable to extend and retract the telescoping support axle such that a spacing between the wheel assemblies can be set to any desired distance. The planter additionally includes a main toolbar assembly connected a toolbar lift and spin assembly rotatably mounted to the support cart and operable to rotate, raise and lower the main toolbar assembly between the Transport Configuration and a Planting Configuration.