Can be added to any quad set-up. Increase drive and provide directional control through turns. Performance Material Size Overview Developed by Sean Mattison for Von Sol surfboards, the FCS VS KNUBSTER is essentially a centre fin that can be added to any quad set-up The fin will increase drive and provide directional control through turns, without sacrificing speed, flow, or the freedom of movement typically associated with a quad. The “KNUBSTER” is designed with a single tab that allows the fin to be positioned in the forward and rear centre plug to cater for the individual drive requirements of each surfer. Ideal Conditions A wide range of conditions from beach breaks to point breaks. Board Types All board types. Will fit the FCS II Fin System when used with grub screws and the FCS Infill Kit. Thermo Polymer X-SMALL (Under 55Kg / 120 Lbs)SMALL (55Kg - 70Kg / 120 - 155 Lbs)MEDIUM (65Kg - 80Kg / 145 - 175 Lbs)LARGE (75Kg - 90Kg / 165 - 200 Lbs)X-LARGE (Over 85Kg / 190 Lbs)
