The Greenough 4A Rotten Avocado 7" by True Ames fin has been the most popular and most versatile Single Fin on the market. This template has been around for about 40 years for a good reason. The wide base and thinner tip creates a lot of drive off the bottom and reaction through arcing turns. This fin is great for generating speed. It also has the right amount of hold and release through turns.
