10 Rules to Choose the Right Fins
These 10 rules will help you select the right fins to tweak your board and make surfing more fun:
If your board feels too stiff, use smaller fins or fins with less sweep or more flex.
If your board feels too loose and lacks drive, use bigger fins, a stiffer flex fin or a fin with more sweep.
Lighter surfers require less fin area to provide enough hold on a wave.
To make a board more responsive, choose a fin constructed of stiffer materials.
Boards with long rails and close fin clusters (known as guns) require less fin area (even guns used for giant surf use small to medium fins).
Boards with much rocker should use fins with more area, depth or sweep.
Boards with deep tail channels need less fin area (small tips can increase the release out of turns).
Boards with wide tails need more fin area than those with narrow tails (fishes).
Small boards in big or powerful waves need larger or more swept fins.
Different sized fins give the surfboard different capabilities. Switch out fins to experiment with your board and its performance.