Embodiments according to the present invention include a load transitioning mechanism which enables attachment and release of at least one ground-contacting adaptive implement, such as a multi-terrain caster wheel assembly, a motorized wheel, or a ski embodiments further enable reversible reconfiguration of the wheelchair by a user between a.) an original load-bearing configuration utilizing the conventional forward caster wheels of the wheelchair, and b.) a modified load-bearing configuration utilizing the ground-contacting adaptive implement.
