Rolling suitcase that converts to a luggage cart

A suitcase, including a kit to convert the suitcase to a luggage cart, comprising:

• a suitcase base having a major bottom wall, opposing front side and rear side walls and opposing top and bottom end walls, the major bottom wall, the front side wall, rear side wall, top end wall and bottom end wall together forming a luggage compartment;
• a suitcase lid operably connected to the suitcase base, the suitcase lid having a closed position closing the luggage compartment and an open position allowing access to the luggage compartment in the suitcase base;
• at least one pair of wheels extending from the bottom end wall of the suitcase base configured to allow the suitcase to be rolled in an upright position with the bottom end parallel to the ground or in a position with the top end tilted toward the user such that the bottom end is tilted from parallel;
• at least three sockets installed in spaced relation in the major bottom wall of the suitcase base and open to an outside of the suitcase;
• and
• at least three stem casters, each stem caster having a wheel rotatable in a housing and a stem attached to the housing, each stem being configured to be removably secured in one of the at least three sockets,
• whereby when the at least three stem casters are secured in the at least three sockets and the bottom wall of the suitcase base is arranged facing the ground with the wheels of the at least three stem casters touching the ground, the suitcase is useable as a luggage cart by piling at least one further suitcase over the suitcase lid.