True Ames Greenough 4-A 10.5" Single Fin – A Longboard Icon
If there’s one fin every longboarder should have in their quiver, it’s the True Ames Greenough 4-A 10.5" Single Fin. Designed by the legendary George Greenough, this fin has become a timeless standard for its unmatched combination of drive, flex, and flow. Whether you’re cross-stepping, trimming down the line, or laying into classic cutbacks, the 4-A delivers responsive performance with a smooth, soulful feel.
Classic Design That Delivers
The Greenough 4-A’s well-balanced template features a wide base that provides powerful drive and control, while the narrow, flexible tip allows for clean, drawn-out turns and stylish transitions. The moderate rake helps keep things smooth through the arc, giving you just enough hold without compromising maneuverability.
Made for Traditional Surfing
At 10.5", this version of the 4-A is ideal for traditional longboards, noseriders, and classic logs where subtle flex, rail engagement, and fluid motion matter most. Whether you ride in small peelers or shoulder-high point breaks, this fin adapts seamlessly to your board and style—offering enough stability for noseriding with the finesse needed for soulful turns off the tail.
Why You’ll Love It
- 10.5" height – perfect for classic single-fin longboards
- Full base for down-the-line speed and control
- Narrow, flexible tip for smooth and responsive turns
- Well-balanced rake and flex pattern
- Iconic Greenough design trusted by longboarders for decades
- Solid fiberglass construction for long-lasting performance
Support a Family-Owned Surf Shop
Purchasing your True Ames gear from Rider Shack means supporting a local, family-run surf shop built by surfers, for surfers. Every order helps us keep the surf spirit alive and share our passion for quality gear, honest advice, and authentic surf culture.
A Must-Have Fin for Longboard Purists
The Greenough 4-A 10.5" Single Fin is more than just a piece of equipment—it’s a symbol of longboarding tradition. Trusted for generations and still leading the way in performance and feel, this fin is ready to bring timeless flow to every ride.
