Greenough 4A 9.75" Clear Books We have tested this on

We have tested this on a wide variety of boards and a variety of tail shapes

Their ultra-light construction features a slight horned temple and notched bridge

In his long-awaited memoir

5'8" x 20 5/8" x 2 3/4"

Greenough 4A 9.75" Clear Books We have tested this onThere 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