Abstract: An improved trimaran is provided that includes a car-like steering configuration and interchangeable floats or pontoon supports to vary the width of the trimaran, depending on whether the user wishes to sail the trimaran or transport it to another location by for example, loading it on a trailer. The trimaran includes a main section, multiple floats, a sail assembly and a set of beams that are used to removably position the floats a certain distance from the main section. The set of beams include beams of different lengths that enable the user to choose a subset of the set of beams to construct a trimaran of varying width. The center section includes a centerboard assembly, steering assembly, cockpit area, bulkhead areas and mast receiving area. The controls for the centerboard assembly and steering assembly are centrally located in the front portion of the cockpit area and the cockpit area is positioned between the bulkhead areas.