FCS II Matt Biolos Split Keel Quad Fins

Matt 'Mayhem' Biolos's 'MB' PG shaper fin. High area specialty quad set adds bite and control.

Upright keel template designed for traditional fish shapes.

Free shipping on this item

Rated 5.0 out of 5
Based on 3 reviews
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Want it before Christmas?

Order before the 13th of December

  • Overview

    • Matt 'Mayhem' Biolos's specialty quad fin set.
    • High area quad keel set adds bite and control to hybrid boards with wide tails, without sacrificing pivoting capabilities.

    Board Types

    • Designed to fit the FCS II Fin System.
    • Recommended for all board types including modern fish and hybrid models with moderate-to-low rocker.

  • Performance Glass

    Performance Glass (PG) fins are machine-cut from layers of solid fiberglass. These fins are stiff and are widely used by pro-level surfers because the integrity of the flex is maintained under immense force, and in the most extreme of conditions and situations.


  • Large - Extra Large 

    New Sizing for Specialty Fins

    You may notice new size ratings for our Specialty Fin Range. Previously, all Specialty Series fins were rated an XL. To better reflect fin sizing, we now have 3 new size categories:S-M, M-L, and L-XL.

    Please refer to the Size/Fin Data tab on the product page to compare dimensions, or alternatively, you can find more information on the FCS Fin Data Page

     Fin

    Base (inches)

    Base (mm)

    Depth (inches)

    Depth (mm)

    Area (inches)

    Area  (mm)

    Sweep Deg°

    Foil

    Side  5.27 133.7 4.66 118.4      18.31 11810    42.5° Flat
    Q-Rear  4.03 102.2 4.40 111.8      12.63 8150     
    28.5° 80/20

    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 5.0 out of 5
    Based on 3 reviews
    • 5 Stars
      3 Reviews
    • 4 Stars
      0 Reviews
    • 3 Stars
      0 Reviews
    • 2 Stars
      0 Reviews
    • 1 Star
      0 Reviews
    100% of reviewers would recommend this product to a friend
    3 Reviews
    Reviewed by Jim B.
    Verified Buyer
    I recommend this product
    Rated 5 out of 5
    Review posted

    Quad Fins for Fish

    Compliments the ...Lost Hydra well. Lot's of drive in smaller weaker surf.

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    Reviewed by Shahaf H.
    Verified Buyer
    I recommend this product
    Rated 5 out of 5
    Review posted

    Best Fins!!!

    I have the Lib Tech Hydra 5'3" and it works perfectly!

    Very responsive, generate speed and the control is absolutely amazing!

    Highly recommended to have in your arsenal!!!

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    Reviewed by Tony, from Australia
    Verified Buyer
    I recommend this product
    Surfing Ability
    Intermediate
    Board Type
    • Funboard
    Rated 5 out of 5
    Review posted

    Great fins

    Great looking Fins thst are excellent for hold on steeper waves and provide heaps of thrust amd work great on the Lost RNF Retro and any similar style board.

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