Self-powered vehicle with selectable operational modes

A battery powered golf cart with selectable dual operative modes, walk-behind mode and a ride-on mode, comprising three units:

• a drive/riding unit having a pair of drive wheels defining a wheel base, said drive/riding unit including a battery compartment for housing a battery, a golf bag support unit, and a front caster wheel unit, said three units being interconnected for cooperative association in said two operative modes by a bar linkage system, having two stable positions, wherein in the ride-on mode, the wheel base is longer than in the walk-behind mode;
• wherein
• the drive/riding unit further comprises a foldable step/drive portion coupled to a manually tiltable steering column assembly portion having a handle bar;
• and
• the bar linkage system is articulated between the golf bag support unit and the steering column assembly portion and is configured to raise or lower a point of attachment of the step/drive portion to the steering column assembly portion by a user manually tilting the steering column assembly portion forwards or backwards, respectively, thereby reducing or extending the wheel base and folding or unfolding the step/drive portion.