FCS GMB-5 Tri Fin Set

  • Overview

    This is SoCal standout shaper, Matt Biolos' go-to fin. The honeycomb construction allows for an ultralight upgrade, carbon strips tightening up the flex even more for hair-trigger response. The goal is speed, power and flow. The thruster setup works best in good+ conditions when you need a predictable, reliable performance response. Inside foil tech tightens your turns, keeping you centered in the power source of the wave.

    Ideal Conditions

    These fins work in all scenarios but really shine when it's pumping!

    Board Types

    All shorter templates, high octane shortboards to classic fishes

    Fin Material

    Performance Core construction mimics the firm flex and quick response of fiberglass fins with the added bonus of featherweight build. The RTM (Resin Transfer Moulding) construction yields a lightweight fin with snappy response, a sheen texture and clean look.

  • Fin Size

    LARGE (165lbs-200lbs)

    Fin Specs


    Base: 4.41 / 112mm
    Depth: 4.74" / 120mm
    Area: 15.26"² / 9847mm²
    Sweep: 32.9°
    Foil: Inside Foil/ 50-50


Category: Thruster

Type: Fins

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