Universal GFN Surficata FCS I fins (Large 4.7″) – a durable set for river surf, wave pools, and ocean conditions. They deliver maximum stability, control, and reliable performance for demanding waves and powerful carving.

These large fins are the ideal choice for surfers who need strong directional hold and aggressive turns. The GFN composite (glass-filled nylon) offers excellent stiffness while retaining enough flex. Thanks to their larger surface area, they provide stronger traction even in steep, powerful waves.

Is this the right size for me?

Small fins (S) are more playful and great for tricks, medium fins (M) are versatile. Large fins (L) provide the most stability and support for hard carving turns and powerful standing waves. The increased surface area slightly reduces the looseness and playfulness of the board. On Prague’s Štvanice wave, most riders use S and M sizes.

Features

• Durable GFN composite – an excellent balance of stiffness and flex
• Larger surface area for stronger traction and maximum control
• Hydrodynamic shape optimized for powerful waves, river surf, and ocean use
• Available as a 2-piece Fin Set (left + right)
• Proven on Eisbach, UNIT Surf Pool, and Citywave

Specifications

• Size: Large (4.7″)
• Type: FCS I
• Material: GFN (glass-filled nylon)
• Color: Black
• Dimensions: height 120 mm × base 110 mm
• Weight: 70 g per fin

Compatibility

Fits all FCS I fin boxes (X2, Fusion, SANE) and also works with FCS II boxes (adapters recommended but not required).

Variants

👉 Fins are available in both standard and hand-cut (Cut Base) versions to protect your board when hitting kickers. If cut-base fins are not currently in stock, let us know before ordering and we’ll make them for you.

Comparison of Surficata FCS I surf fin sizes. A scale is shown in the center.