True Ames Greenough Power Blade Single Fin

Epoxy/Fiberglass Composite Fin

The Power Blade is a specialized single fin based on an original template by George Greenough, developed to expand the performance potential of single-fin surfboards in the mid-length range. Designed with a narrow base, rigid lower section, and a uniquely flexible tip, this fin supports high-speed directional control and increased responsiveness, while retaining the flow and trim characteristics of traditional single fin setups.

A key feature of the Power Blade is its engineered twist at the head of the fin. This “twist-off” flex pattern mimics variable tow dynamics typically found in thruster configurations, allowing the tail of the board to follow the nose through turns. The result is added propulsion, reduced drag, and improved rail-to-rail transitions, without the use of side fins. The narrow base reduces water resistance, while the responsive tip enables precise control and maneuverability, especially in more critical sections of the wave.

The construction uses a proprietary epoxy/fiberglass composite material with heat-treated bonding to retain flex characteristics while providing long-term structural stability. The lower section (“leg”) of the fin remains stiff under load to anchor the flex response higher up the fin body, supporting both speed generation and directional hold. The design evolved through extensive testing, material experimentation, and design iteration to meet both strength and flex targets in demanding surf conditions.

Compatible with a range of mid-sized and performance single-fin boards, the Power Blade is intended for surfers seeking a modern, high-response feel from a single fin without losing the fluidity and style associated with classic single-fin surfing.

Designed for mid-length single-fin surfboards

High-aspect profile with twist-off flex response

Narrow base for low drag and high maneuverability

Stiff lower section for structural load management

Built from heat-treated epoxy and fiberglass composite

Combines classic single-fin flow with modern performance characteristics