FCS II Fins JS PC Large Tri-Quad Fin Set

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Surf the FCS II JS PC Tri-Quad Fin Set a tri or as a quad to power through turns and dial in your rail to rail game. Recommended for boards with deep concaves and moderate-to-extreme rocker, the JS PC Fins from JS Surfboard shaper Jason Stevenson, have an elongated base and high sweep angle paired with a relatively narrow tip. This combination allows for easy release and controlled direction changes. Performance Core construction delivers a stiff and responsive fin that is incredibly lightweight. Particularly good in point and reef breaks, the JS PC Fins deliver a smooth ride with exceptional flow and drive.

What I like about this fin is just the speed and flow that it has, then if you want to push it a little harder it has the release too. To put it simply, it’s just really reliable” - Jason Stevenson


Performance Core construction features an updated large hex core that reduces weight, resulting in a lighter and more responsive fin. 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.

Tech Specs


  • Base: 4.61 in, 117 mm
  • Depth: 4.65 in, 118 mm
  • Area: 15.81 sq in, 10200 sq mm
  • Sweep: 36.1°
  • Foil: Flat


  • Base: 4.09″ / 104mm
  • Depth: 4.26″ / 108mm
  • Area: 12.63″² / 8150mm²
  • Sweep: 32.4°
  • Foil: 80/20


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


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Returns are easy! We understand that in some situations returns or exchanges may be necessary. We also want you to be stoked on your purchase. 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. Items must be in new condition with original tags and packaging.

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