![Greenough 4-A 10.5" (Yellow) - True Ames](http://rhodeislandsurfco.com/cdn/shop/products/greenough-4-a-lite-yellow_1800x1800_927851c4-80ab-4ac4-a837-1c09302612ec_{width}x.jpg?v=1668450216)
There is a reason this is the most iconic, functional and versatile single fin available...it works on just about anything! The Greenough 4-A has been our bread and butter for close to 40 years now, and is still the most popular single fin design there is.
A truly well-balanced fin...the full base coupled with the tapering, moderately flexible tip provides a solid amount of drive off the bottom, and an acute responsiveness through arcing turns. Designed for both speed generation and spending time surfing in the pocket, the 4-A is a fin that will hold when you need it to and release when the time is right.