True Ames
Greenough 4-A
- Box:Longboard / Single-Fin Box
- Size:6.5"
- Construction:Hand-laid fiberglass
$98
Typical lead time: 4–11 days.
Fits 10" longboard / single-fin boxes.
Universal single-fin box. Standard across longboards from every brand.
Not sure what your board has? Read the fin-box guide.
Buy at True Ames
Native Lundquist checkout is coming soon. For now, this links to True Ames directly.
About this fin
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 True Ames' 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.
Need help picking a fin? Read the fin guide or message Blake.