FCS II AM PG Large Thruster Fin Set

The FCS II Al Merrick Large PG Pro Tri Fin Set is engineered for high-performance power surfing. Designed by Al Merrick of Channel Islands Surfboards, this fin set delivers exceptional speed and hold for surfers who demand drive, control, and precision in steep and fast conditions.

The raked side fins create solid down-the-line momentum, while the slightly smaller center fin in the large template enhances tail release, giving you the ability to break free when needed without sacrificing hold. This makes the set ideal for high-powered turns and drawn-out carves in hollow reef breaks or punchy beachies.

Built using Performance Glass (PG) construction, these fins are crafted from solid layers of fiberglass, offering unmatched stiffness, durability, and memory recall. They hold up under intense pressure and deliver immediate response, even in the most demanding surf.

Perfect for advanced surfers riding performance shortboards with deeper concaves and moderate-to-extreme rocker, this fin set is a go-to when you’re looking to engage the rail and lay into powerful, committed turns.

Key Features:

• Template: Raked side fins for drive and control; smaller center fin for enhanced release
• Construction: Performance Glass – ultra-stiff with fast memory for explosive performance
• Ideal Conditions: Steep, hollow waves and powerful beach breaks
• Fin Setup: FCS II Tri Fin – no tools required
• Recommended For: Performance boards with deep concaves and aggressive rocker profiles

Large Size Fin Specs:

• LRG Side Fins: Base – 4.61″ / 117.1 mm | Depth – 4.69″ / 119.0 mm | Area – 15.63 in² / 10083 mm² | Sweep – 36.3° | Foil – Flat
• LRG Center Fin: Base – 4.47″ / 113.5 mm | Depth – 4.45″ / 113.0 mm | Area – 14.68 in² / 9469 mm² | Sweep – 38.6° | Foil – 50/50

Fin Family – Carver:

Power. Control. Hold. As part of the Carver family, the Al Merrick PG Pro Large Set is designed for surfers who push hard through rail turns and need long, powerful lines with dependable hold—especially in critical, fast-moving surf.

The FCS II Al Merrick Large PG Pro Tri Fin Set is built for surfers seeking explosive performance, strong hold, and controlled release when the waves demand more power and precision.

Why Shop at Rider Shack?

Rider Shack is a small, family-run surf shop committed to quality gear, real advice, and helping every surfer find the perfect setup. We stock only what we believe in—gear we’ve tested and trust—so you can surf with confidence session after session.

Lock in powerful turns and precision drive with the FCS II Al Merrick Large PG Pro Tri Fin Set—trusted by pros, refined for performance.