FCS II Matt Biolos Mayhem Quad Rear Fin Set

Developed by shaper Matt Biolos, the Mayhem Quad Rears are designed to perfectly complement the raked Mayhem side fins. 

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  • Overview

    Built for performance, this set delivers maximum speed, drive, and control when surfed as a quad. The 80/20 foil allows for smooth, responsive turns while maintaining stability and flow through carves, giving surfers the confidence to push hard in all conditions.

    • Template developed by Matt Biolos to work with the raked Mayhem side fins.
    • Provides maximum speed, drive, and control in a quad set
    • 80/20 foil promotes easy turning with stability and flow when carving
    • Quad Rear (2 fins) Set

    Ideal Conditions

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

    Board Types

    • Designed to fit the FCS II Fin System.
    • Performance shortboards and hybrid models.

    Fin Family

    • Reactor: Find Speed. Speed, tight turns & snaps.

  • Performance Core Carbon

    Often referred to as PC Carbon or PCC, these fins are highly responsive and feature strategically placed carbon that’s designed to complement the fin template. PCC fins suit fast surfing and are favored by power surfers who like to perform explosive turns on critical parts of the wave.


  • MEDIUM (65Kg - 80Kg / 145 - 175 Lbs)
    LARGE (75Kg - 90Kg / 165 - 200 Lbs)

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



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