True Ames Greenough 4A Fin specs diagram - versatile medium profile fin specs diagram
True Ames True Ames Greenough 4A Single Fin
True Ames Greenough 4A Fin specs diagram - versatile medium profile fin
True Ames Greenough 4A Single Fin
True Ames True Ames Greenough 4A Single Fin
True Ames True Ames Greenough 4A Single Fin
True Ames True Ames Greenough 4A Single Fin
True Ames True Ames Greenough 4A Single Fin
True Ames True Ames Greenough 4A Single Fin
True Ames True Ames Greenough 4A Single Fin
True Ames True Ames Greenough 4A Single Fin
True Ames True Ames Greenough 4A Single Fin
True Ames True Ames Greenough 4A Single Fin
True Ames True Ames Greenough 4A Single Fin
True Ames True Ames Greenough 4A Single Fin
True Ames True Ames Greenough 4A Single Fin
True Ames Greenough 4A Fin specs diagram - versatile medium profile fin
True Ames Greenough 4A Single Fin
True Ames True Ames Greenough 4A Single Fin
True Ames True Ames Greenough 4A Single Fin
True Ames True Ames Greenough 4A Single Fin
True Ames True Ames Greenough 4A Single Fin
True Ames True Ames Greenough 4A Single Fin
True Ames True Ames Greenough 4A Single Fin
True Ames True Ames Greenough 4A Single Fin
True Ames True Ames Greenough 4A Single Fin
True Ames True Ames Greenough 4A Single Fin
True Ames True Ames Greenough 4A Single Fin
True Ames True Ames Greenough 4A Single Fin

True Ames Greenough 4A Single Fin

By True Ames
From $75.00 USD

The Greenough 4-A Single Fin is the most iconic, functional and versatile single fin available, because it works extremely well on just about every type of surfboard. The 4-A has been ' bread and butter for over 40 years now, and it is still the most popular single fin design there is due to it's all-around and well-balanced performance.

Fin Construction: Solid Fiberglass
Designer Name: George Hamilton Perkins Greenough
Designer Origin: Santa Barbara, California
Designer Bio: Greenough treated the fin as a true hydrodynamic foil—pursuing high-aspect, lower-drag outlines and intentional flex to reduce drag and increase control through powerful arcs. His "high aspect ratio" and signature flex-fin concepts helped unlock faster, more radical surfing lines and were central influences on the 1960s–70s performance/shortboard progression.

🚚 Free shipping over $150 for USA
📦 Ships from our Ocean Beach shop
🔄 Easy returns within 30 days
🏪 Visit us in person: 4051 Judah St

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