A foldable adjustable dynamic wheelchair including a seat assembly and a push handle assembly configured to serve as a chair back frame both of which are pivotally connected to a mobility base having a pair of spaced apart front rear wheels and a front wheel. A pair of selector plates each having a pair of valleys at a bottom edge thereof are each mounted to either side of the mobility base. A foot operable actuator member is connected to an over-center assembly for moving a latch bar into a valley on one side of center and for moving the latch bar outside a valley on the other side of center. With the latch bar located in one valley the wheelchair is configured in an upright configuration and when the latch bar is located in the other valley, the wheelchair is configured in an extended position.