Technology is provided for a self-balancing robot that transitions from a three-wheeled mode to a two-wheeled self-balancing mode. The robot includes a body and a pair of drive wheels located at a first end portion of the body. Each drive wheel is coupled to a drive assembly operative to propel the robot along a surface. A third wheel is located on the body at a second end portion opposite the first end portion. A main arm is coupled to the body, wherein the main arm is rotatable to confront the surface and lift the third wheel away from the surface, thereby standing the body up onto the pair of drive wheels in preparation for self-balancing.