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FCS Fins Stretch SF4<br /> (PC or Glass Flex)<br /> (Thruster | Quad | 5-Fin)

FCS Fins Stretch SF4
(PC or Glass Flex)
(Thruster | Quad | 5-Fin)

FCS SF4 Fins Stretch Tri-Quad<br /> Performance Core (5-Fin Set)
FCS SF4 Fins Stretch Tri-Quad
Performance Core (5-Fin Set)
FCS SF4 Fins Stretch Tri-Quad<br /> Glass Flex (5-Fin Set)
FCS SF4 Fins Stretch Tri-Quad
Glass Flex (5-Fin Set)
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FCS SF4 Stretch Fins (Thruster, Quad 5-Fin)


With the FCS SF4 (Also called the Stretch or Stretch Quad) Fins you get the FCS Stretch Quad template, refined by FCS and the team over at Stretch Surfboards.


FCS SF4 Stretch Fins

The FCS SF4 Stretch Quad Fins design features a large template, with moderate foil on 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 FCS Quad SF4 Fins provides power, giving you the ability to generate speed with ease. With the FCS Stretch Quad Fins as speed increases, 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. And all these characteristics are enhanced in Performance Core!

FCS SF4 Stretch Fin Material
Performance Core material and construction is designed to deliver the feeling of a traditional fiberglass fin with added performance and reduced weight. The Resin Transfer Molding process produces a lightweight fin with amazing flex and smooth feel.

The FCS SF4 Stretch Fins Performance Core: available in Thruster, Quad and 5-Fin

Glass Flex has been formulated to replicate the flex and memory properties of hand layered fiberglass. This material will be more flexible than the other materials in this range. Some surfers may prefer the feel of glass flex in smaller surf. It also gives a more positive flex pattern and remarkable flex memory.

The FCS SF4 Stretch Fins Glass Flex: available in 5-Fin, Quad and Thruster


FCS SF4 Stretch Front Fin Size:
165lbs/75kg - 198lbs/90kg
Base: 4.48 in. 114 mm
Depth: 4.48 in. 114 mm
Area: 15.15 in.² 9776 mm²
Sweep: 30.5°

FCS SF4 Thruster Rear Fin Size:

Base: 4.49 in. 114 mm
Depth: 4.44 in. 113 mm
Area: 15.14 in.² 9772 mm²
Sweep: 30.7°

FCS SF4 Quad Rear Fin Size:
Base: 3.88 in. 98 mm
Depth: 3.80 in. 96 mm
Area: 11.22 in.² 7238 mm²
Sweep: 30.7°

The FCS SF4 Stretch Fins: available in Performance Core Yellow and Glass Flex

Finatic Fin Reviews
Click here to read reviews from Finatic™ Members


"Very Responsive"
- Christopher C., Jacksonville, FL on the FCS SF4 Stretch Quad PC

Overall Fin Rating: 4

Height: 5'7"
Weight: 141 - 150 lbs.
Surfing Experience: (1 - 10): 7

Home Break: Jacksonville Beach, FL
Where did you surf these fins: Jacksonville Beach
Wave Height: 2 - 4 ft.
Wave Conditions: Good
Misc. Wave/Location Information: N/A

Type of Board: Fish
Board Size: 5 ft. 5 in.
Fin Setup: Quad
Misc. Board Information: 6'0" x 15 3/4" (M) x 20 3/8 (T) x 13 1/2 (N) 5-Fin single-double V bottom. Swallow Tail 3" Thick

Other Thoughts: Very responsive, easy to pickup speed with a pump or two, easy to turn - overall, fun fins.


"Not for Me"
- Kevin O., Daytona Beach, FL on the FCS SF4 Stretch Quad PC

Overall Fin Rating: 2.5

Height: 5'8"
Weight: 171 - 180 lbs.
Surfing Experience: (1 - 10): 5

Home Break: Daytona Beach, FL
Where did you surf these fins: Different spots, East Coast, FL
Wave Height: 1 - 2 ft.
Wave Conditions: Poor
Misc. Wave/Location Information: N/A

Type of Board: Fish
Board Size: 6 ft. 8 in.
Fin Setup: Quad
Misc. Board Information: Round nose quad, fish tail

Other Thoughts: These fins are not for me, on my boards in these conditions.


"Very Fast Down the Line"
- David J., Manhattan Beach, CA on the FCS SF4 Stretch Quad (5-Fin) Glass Flex

Overall Fin Rating: 4

Height: 5'10"
Weight: 181 - 190 lbs.
Surfing Experience: (1 - 10): 9

Home Break: El Porto
Where did you surf these fins: El Porto/C Street
Wave Height: 2 - 4 ft.
Wave Conditions: Good
Misc. Wave/Location Information: N/A

Type of Board: Shortboard
Board Size: 6 ft. 2 in.
Fin Setup: Quad
Misc. Board Information: CI Whip

Other Thoughts: Nice fins, good drive but still can turn tight and they're very fast down the line.


"Great fins"
- Berry H., Port St. Lucie, FL on the FCS SF4 Stretch Quad (5-Fin) Performance Core

Overall Fin Rating: 5

Height: 5'8"
Weight: 141 - 150 lbs.
Surfing Experience: (1 - 10): 5

Home Break: North Jetty Ft. Pierce, FL
Where did you surf these fins: North Jetty
Wave Height: 2 - 4 ft.
Wave Conditions: Good
Misc. Wave/Location Information: N/A

Type of Board: Hybrid
Board Size: 5 ft. 9 in.
Fin Setup: Quad
Misc. Board Information: 5'9" Stoke surfboard...similar to the sperm whale

Other Thoughts: These fins were great, loved them!!!



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