Greenough 4-A Single Fin

The Greenough 4-A Surfboard Fin – a timeless classic.  It’s also been the most popular single fin worldwide for decades–and for good reason–its incredible functionality and versatility means it’ll work on just about anything.

The Greenough 4-A is a truly well-balanced fin. Its full base coupled with a 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. 

A true all-arounder, the 4-A is one of the most versatile single fins ever designed The larger sizes are great for single fin longboards, while the smaller and medium sizes pair well with mid-lengths, performance single fins, and 2+1’sBest of both worlds performance: solid base and width create stability and drive, while the rake and flexible tip enables top-to-bottom turns and maneuverabilitySolid fiberglass construction, flat matte finish.