FIN MATERIAL PERFORMANCE CORE. FIN SIZE LARGE (75 - 90Kg / 165 - 200 Lbs). FIN SPECS Base: 4.61" / 117mm, Depth: 4.70" / 119mm, Area: 15.63"^2 / 10083mm^2, Sweep: 36.3 degrees, Foil: Flat. Designed for fast on-rail surfing. The raked side fins produce e
The FCS system (Fin Control System) was designed by Brian A. Whitty in Elanora, Australia, and patented on November 7, 1995. It can be recognized by the 2 tabs on the fins which are designed to fit into a securing plug that attaches the fin to the board.