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FCS II H4 Large Tri Fin Set

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FCS II H4 Large Tri Fin Set

sku# 180864
FCS - II H4 Large Tri Fin Set
Model Info
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Product Info

A fin like you've never seen before. The FCS II H4 Large Tri Fin Set is Swiss engineered, creating a perfect synergy between geometry and HI-FI materials. With two radically different side and center fin templates, the H4s strike the perfect balance of speed, flow, responsiveness and control.

Product Details


High Density Uni Directional Carbon FiberLight & super strong with custom orientation to transfer more of your energy into speed than any other fin.

Precision Swiss EngineeredCreates perfect synergy between fin geometry & HI-FI materials, giving smooth & predictable feel.

Dynamic Trailing EdgeInternal composite morphs under extreme load, enabling the fins to be pushed harder without sliding out.


Side FinsBase: 4.59" / Depth: 4.57" / Area: 15.84in² / Sweep: 38.3˚

Center FinBase: 4.52" / Depth: 4.73" / Area: 15.33in² / Sweep: 37.2˚


Side Fins - Flat FoilA flat inside face combined with a convex outside face. The traditional flat sided foil offers an even combination of drive, pivot, and hold. Provides a very consistent, reliable feel over a wide variety of conditions.

50/50 FoilA symmetrical foil used on all centre fins where both sides are convex. Even water flow on both sides creates stability and control.

Ideal ConditionsA wide range of conditions, particularly good in critical overhead waves.

Board TypesRecommended for performance shortboards with moderate-to-low rocker.

Side Fin ProfileLower section produces maximum acceleration, while hatchet like tip creates stability & control.

Centre Fin ProfileHighly raked elliptical outline reduces drag, and offers feeling of predictability when releasing through turns.

Fin Foils TemplateThicker base with tapered tip optimises flex & regulates the release of energy during rail to rial transitions.


3 Fins


  • Material: Carbon Fiber
  • Fin Category: Thruster (Tri)
  • Fin Box Compatibility: FCS II
  • Includes: 3 Fins
  • Rider Size: L (165+ lbs)
Size Large
Rider Size L (165​+ lbs)

Other Notes

FCS products can only be shipped within the United States and Canada



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