FCS II Fins GL1 Tri-Quad SUP Fin Set

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The FCS II GL1 SUP Tri-Quad Fin Set offers versatility and maneuverability when you are looking to do more with your board. Whether for smooth carves all the way down the line or quick pivotal turns that set you up for the next section, these fins are suited to surfers who like to push hard against their fins. With a quad and tri available in one package, you can use the two set ups to play with the way your board rides, swap your fins at the last minute for the conditions or just simply have more options. Particularly good in point and reef breaks, the highly responsive Gerry Lopez's signature GL1 fin template has a way of making your board come to life.

Tech Specs


  • Base: 4.45 in, 113 mm
  • Depth: 4.75 in, 120 mm
  • Area: 18.12 sq in, 11690 sq mm
  • Sweep: 32.5°
  • Foil: Flat


  • Base: 3.64" / 92mm
  • Depth: 4.13″ / 105mm
  • Area: 11.03″² / 7115mm²
  • Sweep: 30.8°
  • Foil: 50/50


  • Size: Large
  • Fins in set: 5
  • Material: Performance Core


Versatile RTM construction delivers a consistent feel similar to a traditional fiberglass fin, but with the advantage of reduced weight. The stiff flex pattern extends progressively from the base through to the tip helping the surfer to maintain drive and hold through a turn. PC fins are reliable, very responsive, and can be used in a variety of different conditions.


A flat inside face combined with a convex outside face. The traditional flat sided foil offers an even combination of drive, pivot and hold and provides a very consistent, reliable feel over a wide variety of conditions.

50/50 FOIL

A symmetrical foil used on all center fins where both sides are convex. Even water flow on both sides creates stability and control.

***Exclusively for the FCS II Fin System; will not fit in the traditional FCS Dual Plug System***


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If you are not 100% satisfied with your purchase you may return it for a full refund, or exchange within 30 days of receiving your order.