FCS II Mid Side Byte Surfboard Fins — Performance GlassSide Bites for Midlength & Longboard Surfboards.

Upgrade your surfboard’s performance with the FCS II Mid Side Byte Surfboard Fins, engineered to bring out the best in your midlength or longboard. These 3.6″ Performance Glass side bites use a time-tested template that enhances drive, control, and smooth flow without restricting maneuverability. Designed to fit the FCS II fin system, this set is ideal for open-face and down-the-line waves at point breaks, reef breaks, or long walls.

• Designed for Midlength & Longboard Surfboards — Perfect 3.6″ side bite fin set tailored for 2 + 1 and quad surfboard setups, optimized for midlengths and longboards.
• Premium Performance Glass Construction — Made with high-quality Performance Glass (PG) for solid, responsive flex and durable performance in open-face, down-the-line waves.
• Enhanced Control & Stability — Side byte template inspired by classic GL design; adds response and control to improve turning and trim on point breaks and reef breaks.
• FCS II Tool-Less Fin System — Easy, quick insert and removal with compatibility for all FCS II fin boxes (no screws or tools needed).