FCS II Fins JS PC Medium Tri-Quad Fin Set

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As either a tri or as a quad, the FCS II JS PC Tri-Quad Fin Set is for power surfers that like to surf on rail and push hard through turns. 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


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

Tech Specs


  • Base: 4.53 in, 115 mm
  • Depth: 4.53 in, 115 mm
  • Area: 15.08 sq in, 9730 sq mm
  • Sweep: 36.1°
  • Foil: Flat


  • Base: 3.83″ / 97mm
  • Depth: 3.99″ / 101mm
  • Area: 11.08″² / 7150mm²
  • Sweep: 32.4°
  • Foil: 80/20


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.


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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.

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

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