FCS II Skindog Byte PC + Aircore Side Bites Fin SetThe FCS II Skindog Byte PC Side Bites Fin Set creates a 2 + 1 setup that enhances drive, stability, and maneuverability. The side bytes add speed and control, allowing surfers to handle critical sections and maintain stability through sweeping turns. Together, the setup offers a dynamic and versatile longboard experience, ideal for both traditional and progressive surfing styles. Fin Size Detail Fin Depth Base Area Sweep Foil Medium Sides 4. 58" 4.