FCS Compatible Fins Guide
Futures Fin Guide
The more area, the more hold the fin will have. The size of the fin is critical based on the weight of the surfer. The area is the most important number to look at to determine the size of the fin. See fin size chart above.
The larger the base the more drive the fin will have in bottom turns. Base is an important aspect of area. Increasing the base will make a dramatic difference in the drive you feel out of your bottom turns. If the board feels stiff or hard to turn, putting in a fin with a smaller base.
The more rake a fin has the longer and more drawn out turns become. The more upright a fin is, the more pivoty the fin feels. Fins with a larger rake (overhang) will be more stable and fins with less rake are better suited to pocket surfing.
Drive in bottom turns, but breaks free in the lip like a flat fin. A V2 Foil is a V. Foil and Flat Foil blend. It takes the best speed generating attributes of the V. (at the base) and transitions into a flat foil in the tip for a controlled release in critical turns. V. foils feel fluid and drivey, and generate more speed during bottom turns.
Great for getting speed if you are having trouble finding it. Fluid rail to rail transitions. V. Foils are designed to maximize lift with a minimal amount of drag. Fins with this V. Foils will find speed that you did not know was there, or help you get that extra gear to really find drive in your bottom turns. The leading edge of the fin is more rounded accepting more water flow at all angles of attack, and making the fin feel very fluid rail to rail.
Flat foiled fins break free sooner, and are better at controlling speed. Often surfers prefer them in fast powerful surf where they do not need to create additional speed