FCS II H4 Uni-Directional Carbon Thruster Fins

The H4 looks and surfs differently from any other fin. Precision Swiss engineering combined with a highly developed template provides an unprecedented level of control and predictability at high speed.

Unique Template

Radically different templates for the side fins and the center fin combine to form a powerful fin set with maximum speed and drive.

• Side fin profile: The lower part provides maximum acceleration, while the axe-shaped tip offers stability and control.
• Center fin profile: The highly raked, elliptical outline reduces drag and provides a predictable feel when releasing from turns.
• Fin foils: A thicker base with a tapered tip optimizes flex and modulates the release of energy during rail-to-rail transitions.

Ideal Conditions

A wide range of conditions, and especially good in critical overhead waves.

Board Types

Designed for the FCS II Fin System. Recommended for performance shortboards with medium to low rocker.

Fin Family

Accelerator: Find Control. Speed, flow, and response with added control.

New Construction

• Precision Swiss engineering: Ensures perfect synergy between fin geometry and HI-FI materials, offering a smooth and predictable feel.
• High density unidirectional carbon: Light and super strong, with a unique fiber orientation that converts more of your energy into speed than any other fin.
• Dynamic trailing edge: The internal composite deforms under extreme load, allowing you to push the fins harder without breaking out.
• Innovative production: Highly specialized robotics combined with camera-guided quality control guarantees absolute accuracy.

About FCS

FCS is the Australian brand that made the removable fin system popular and has been setting the standard among surfers worldwide for decades. The brand is known for precise templates, well-thought-out constructions, and collaborations with top surfers and shapers. At Hart Beach, you'll find FCS because the system simply works, in every board and every wave.