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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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We understand that when purchasing gifts, returns and exchanges can be necessary, which is why for the Holidays we are extending our Return Policy so that anything purchased as a gift this Holiday Season is eligible to be returned by the end of January. If you are not 100% satisfied with your product you may return it for a full refund, or exchange by the end of the month of January 2020.

Please make sure your wetsuit fits before taking it in the water. We are not able to take returns or exchanges on used wetsuits.

Please reference our full Return Policy.

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