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 4 reviews

$264.95 AUD

Performance
Material
Size

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

S-M: (Under 75Kg / Under 143 Lbs)
M-L: (70Kg - 90Kg / 132 - 187 Lbs)
L-XL: (Above 85Kg / Above - 176 Lbs)

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.

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average rating 5.0 out of 5

Based on 4 reviews

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4 Reviews

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Reviewed by Frank B.

Verified Buyer

I recommend this product

Rated 5 out of 5

Review posted

“Keeling It: The Fins You’ll Fall in Love With”

The FCS II Matt Biolos Split Keel Quad Fins deliver excellent hold and impressive drive, making them perfect for adding speed and power to your surfboard. They’re especially great on wide tail boards and fish designs, providing stability and control without compromising flow. If you’re looking to boost your board’s performance, these fins are a top choice. Love, love, love them!

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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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