Surfboard fins are a critical component of board performance, providing stability, control, and maneuverability in the water. Acting like the rudder on a boat, fins help surfers maintain direction and generate drive through turns. They come in various configurations—such as single, twin, thruster (three-fin), and quad setups—each offering different riding characteristics. The size, shape, and flex of a fin also affect how a board feels underfoot, with larger fins offering more hold and smaller fins allowing for looser, more playful rides.
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