Abstract: A wheeled crossmember assembly (12) and an unwheeled crossmember assembly (16) of a carrier system (10) are detachably clamped in spaced apart locations to the mast of a sailboard. The sailboard and associated components are straped to the crossmember assemblies. Ground engaging wheels (14) are detachably attached to crossmember assembly (12). The end of the mast adjacent crossmember assembly (16) is lifted and either pulled or pushed to transport the sailboard, with the mast acting as the tongue of the carrier system. A pair of rail assemblies (20) are mountable on a standard vehicle top rack for sliding reception of crossmember assemblies (12,16) thereby to transport the carrier system (10) together with the sailboard on the top of a vehicle.