FCS II H4 Tri Fin Set

The H4 looks and surfs differently from any other fin. Precision Swiss engineering matched with a highly evolved template provides an unprecedented level of control and predictability at high speeds.

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Rated 4.9 out of 5
Based on 57 reviews
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  • Overview


    Radically different side & centre fin templates create a powerful fin set with ultimate speed & drive.

    • SIDE FIN PROFILE: The lower section produces maximum acceleration, while the hatchet like tip creates stability & control.
    • CENTRE FIN PROFILE: Highly raked elliptical outline reduces drag, and offers a feeling of predictability when releasing through turns.
    • FIN FOILS TEMPLATE: Thicker base with tapered tip optimises flex & regulates the release of energy during rail-to-rial transitions.

    Ideal Conditions

    • A wide range of conditions, particularly good in critical overhead waves.

    Board Types

    • Designed to fit the FCS II Fin System.
    • Recommended for performance shortboards with moderate-to-low rocker.

    Fin Family

    • Accelerator: Find Control. Speed, flow and response with added control.


      • PRECISION SWISS ENGINEERED: Creates perfect synergy between fin geometry & HI-FI materials, giving a smooth & predictable feel.
      • HIGH-DENSITY UNI-DIRECTIONAL CARBON FIBRE: Light & super strong with custom orientation to transfer more of your energy into speed than any other fin.
      • DYNAMIC TRAILING EDGE: Internal composite morphs under extreme load, enabling the fins to be pushed harder without sliding out.
      • INNOVATIVE PRODUCTION: Highly specialised robotic automation combined with camera-assisted quality control, ensures absolute accuracy. 
      The FCSII H4 Fins are used in conjunction with a sport that is considered dangerous. The manufacturer and retailer assume no responsibility for injuries to persons or property caused by use, misuse or inability to use this product.
      This product is fully guaranteed against faulty workmanship and materials for 1 year.
  • SMALL (55Kg - 70Kg / 120 - 155 Lbs)
    MEDIUM (65Kg - 80Kg / 145 - 175 Lbs)
    LARGE (75Kg - 90Kg / 165 - 200 Lbs)


    Base (inches)

    Base (mm)

    Depth (inches)

    Depth (mm)

    Area (inches)

    Area  (mm)

    Sweep Deg°


    SML Side  4.36 110.6 4.34 110.1 14.29 9221 38.3° Flat
    SML Ctr 4.29 108.8 4.49 113.9 13.82
    8917 37.2° 50/50
    MED Side 4.48 113.6 4.45 113.0 15.07 9721 38.3° Flat
    MED Ctr 4.40 111.7 4.61 117.0 14.58 9405 37.2° 50/50
    LRG Side
    4.59 116.5 4.57 115.9 15.84 10221 38.3° Flat
    LRG Ctr 4.52 114.6 4.73 120.0 15.33 9893 37.2° 50/50

    View the FCS Fin Data page for Base/Depth/Area/Foil information.

  • We offer:

    • Free Express Shipping: on this item.
    • Tracking: Quick & easy online tracking. 
    • Peace of Mind: All our deliveries are fully insured against damage.
    • Returns: 30-day exchange or refund for unopened items.


    average rating 4.9 out of 5
    Based on 57 reviews
    • 5 Stars
      54 Reviews
    • 4 Stars
      2 Reviews
    • 3 Stars
      1 Review
    • 2 Stars
      0 Reviews
    • 1 Star
      0 Reviews
    96% of reviewers would recommend this product to a friend
    Customer photos and videos
    57 Reviews
    Reviewed by Dane
    Rated 5 out of 5
    Review posted

    5 Stars


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    Reviewed by Alexander W., from Australia
    Verified Buyer
    I recommend this product
    Surfing Ability
    Board Type
    • Performance
    Rated 5 out of 5
    Review posted

    FCS 2 H4 Large

    Love them! Feel super fast from take off! Slingshot speed and great control!

    Was this helpful?
    Reviewed by Stephen
    Rated 5 out of 5
    Review posted

    5 Stars


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    Reviewed by Nathan G.
    Verified Buyer
    I recommend this product
    Rated 5 out of 5
    Review posted

    Hi tech that delivers

    best all around fin i have used. Great combination of speed and control. Hold very well in hollow waves.

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    Reviewed by Lula C.
    Verified Buyer
    I recommend this product
    Rated 5 out of 5
    Review posted

    Best fins I have had

    So much flow and speed with the H4 fins set!

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