FCS MR Twin + Stabilizer Sunset Swirl

The FCS II Mark Richards Twin + Stabiliser Fin Set in the stunning Sunset Swirl colorway brings timeless performance together with vibrant, surf-inspired aesthetics. Based on Mark Richards’ legendary twin fin template, this set delivers high-speed flow, responsive rail transitions, and the freedom to surf with style—all with a splash of colorful flair.

Engineered for speed and drive, the large, raked twin side fins generate powerful acceleration and hold through carves, while the small stabiliser (center fin) adds a layer of control for more confident surfing in steeper sections or punchy beach breaks. The result is a loose, skatey feel with added grip when you need it—perfect for twin fin lovers who still want that touch of control.

Made from Performance Core (PC) construction, this fin set features lightweight materials and a progressive flex pattern that maintains responsiveness through turns. The Sunset Swirl colorway adds eye-catching style to any board, inspired by the warmth and motion of late-day sessions under a painted sky.

Key Features:

• Colorway: Sunset Swirl – warm, vibrant tones with surf-inspired energy
• Template: Mark Richards twin fin design with a small center stabiliser for added control
• Construction: Performance Core – lightweight, durable, and flex-tuned for responsiveness
• Performance: Fast, flowing lines with the ability to loosen up or dial in stability with the stabiliser
• Fin Setup: FCS II Twin + Stabiliser – tool-free installation and easy fin swaps
• Recommended Boards: Fish, funboards, twin fin setups, and alternative shapes

Fin Size Specs:

• Side Fins: Base – 5.06″ / 128.4 mm | Depth – 5.56″ / 141.1 mm | Area – 21.06 in² / 13,590 mm² | Sweep – 32.1° | Foil – Flat
• Center Stabiliser: Base – 3.31″ / 84.0 mm | Depth – 3.34″ / 84.8 mm | Area – 8.23 in² / 5,307 mm² | Sweep – 29.1° | Foil – 50/50

Fin Family – Performer Meets Specialty:

Combining the glide and looseness of a twin with added control from the stabiliser, this set sits comfortably between the Performer and Specialty categories—offering style, speed, and versatility in one eye-catching setup.

The FCS II Mark Richards Twin + Stabiliser – Sunset Swirl is perfect for surfers who want expressive, fast lines with the added security of a third fin—plus a colorway that captures the vibe of golden hour sessions and endless summer surf.

Why Shop at Rider Shack?

We’re a small, family-run surf shop that lives and breathes the ocean lifestyle. Every product we carry is selected with performance, quality, and surf culture in mind. When you shop Rider Shack, you’re getting more than gear—you’re joining a community of surfers who care about the details.

Ride with style and confidence on the FCS II Mark Richards Twin + Stabiliser Fin Set – Sunset Swirl—a fin that blends function, freedom, and vibrant design.