True Ames Greenough 4A

The 4A is incredibly versatile. It pairs exceptionally well with mid-lengths, eggs, and traditional longboards, offering a balanced feel that works on almost any single-fin setup.

The moderate flex in the tapered tip allows the fin to load up and spring out of turns, giving you a smooth, lively feeling rather than a stiff, rigid one. It helps you maintain momentum through arcing turns without sacrificing hold.

While the 4A is designed more for performance and turning than pure noseriding stability, its full base offers enough hold to keep the tail engaged. If you are looking for a dedicated pivot fin for longboard noseriding, you might prefer a wider, more upright template.

A general rule of thumb is to match the fin length in inches to the length of your board in feet—for example, a 7-inch fin for a 7-foot board. However, if you prefer a looser feel, you can size down, or size up if you want more drive and hold.

Yes, the 4A is designed to fit standard US-style single fin boxes. It comes with a standard plate and screw, making it compatible with the vast majority of modern and vintage single-fin longboards and mid-lengths.