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FCS SF4 Stretch Quad Fins
The FCS SF4 Stretch Quad Fins design features a moderate foil alon a wide base, which help to generate significant speed from the initial turn, and a neutral foil along a thin, flat tip. At low speeds, the ample surface area in the tip of the Quad SF4 provides power, giving you the ability to generate speed with ease. At increased speeds, applied force will allow the thin tip to twist with the flow (much like a birds wing in flight) becoming neutral while reducing lift and drag through turns. These cambered foils were developed using a NACA (National Advisory Committee for Aeronautics) foil in combination with theories taken from sailboard sails. With years of fin experience Stretch foiled the first prototypes of the Quad SF4 himself. The result on your Quad is a board that is free yet stable at high-speed turns.
FCS SF4 Stretch Quad Front Fin Size:
Base: 4.48 in. 114 mm
Depth: 4.48 in. 114 mm
Area: 15.15 in. 9776 mm
Sweep: 30.5
FCS SF4 Quad Rears
Base: 3.88 in. 98 mm
Depth: 3.80 in. 96 mm
Area: 11.22 in. 7238 mm
Sweep: 30.7°
The FCS SF4 Stretch Fins: available in Glass Flex
Become a Finatic™ and test fins from FCS & Future Fins!
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| FCS SF-4 Stretch Thruster Set |
| Price: $45.99 |
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| FCS SF-4 Stretch Quad Fins (4-Fin) |
| Price: $55.99 |
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| FCS SF-4 Stretch Tri-Quad Set (5-Fin) |
| Price: $61.99 |
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