Single Fin: The single fin is the basic surfboard and has been built in a full range of lengths, utilizing a wide variety of template designs. Single fins have been experimented with and refined throughout the evolution of surfboard design. They have been adapted to ride all sizes of surf. The tri fin has been the first concept in the history of surfboard design to successfully challenge the versatility of the single fin.

Purpose: The single fin utilizes one fin that is located directly over the midline of the tail. This gives it a very neutral turning characteristic.