In 2005, Devon Howard opined that “Nearly every quantum leap in board design has revolved around the fin and its various configurations.” Changes to rake, foil, cant, and surface area notwithstanding, pivotal moments in surfboard fin history are centered around the number of fins on the bottom of a board. Names like Mark Richards and Simon Anderson are synonymous with the number of fins they preferred. And now, it isn’t uncommon to see a board with anywhere from one to five fins in the lineup.
But for all the openness modern surfers seem to show toward fin quantity, they are notoriously skeptical about fins that diverge from the typical linear design. The Turbo Tunnel and FCS’ effort to add curve with their PC-CRV fins are two of many attempts to innovate fin design that never really took off.