Surf FCS 

A Guide to FCS Fins

by Chris D | Feb 28, 2013

Finding The Right Size Fin

FCS thruster and quad sets are categorised by size. Each size category has an optimum weight range that can be used as a guide when choosing a fin:

 fcs fins extra small Optimum Weight Range under 120lbs / under 55kg 
 fcs fins small Optimum Weight Range 120-155lbs / 55-70kg
 fcs fins medium Optimum Weight Range 140-175lbs / 65-80kg
 fcs fins large Optimum Weight Range 165-200lbs / 75-90kg
 fcs fins extra large Optimum Weight Range over 190lbs / over 85kg 
 fcs fins special For specific surfboard designs or as specialised fins


How Fin Materials Can Improve your Surfing

So you’ve decided on the fin template that’s right for you… But what about the fin construction? This video explains the 6 constructions currently used in the FCS fin range so you can make an educated decision going into your next fin purchase.

FCS II PCC Material  
Performance Core Carbon (PCC)
Our new PCC construction with ‘Linear Flex’ produces a 3D twist & roll action resulting in a fast, super responsive fin that feels much smoother through turns. PCC fins suit fast surfing and are favoured by more advanced surfers who like to perform explosive turns on critical parts of the wave.
 FCS II PC Material   Performance Core (PC)
Performance Core material and construction is designed to deliver the feeling of a traditional fiberglass fin with the added performance of reduced weight. The RTM (Resin Transfer Moulding) process produces a lightweight fin with remarkable flex, a smooth feel and an impressive aesthetic.
 FCS II PG Material
Performance Glass (PG)
Performance Glass material characteristics and flex pattern are identical to traditional fiberglass fins offering a stiff base with subtle responsive tip flex, amazing aesthetics and proven durability.
 FCS II Neo Glass Material
Neo Glass
Lightweight, moulded fiberglass construction delivering pro standard performance. The high fiberglass content makes these fins stiff and responsive, and the engineered foils provide a consistent feel in a range of different conditions.
 FCS II Glass Flex Material
Glass Flex (GF)
Glass Flex has been formulated to replicate the flex and memory properties of hand layed fiberglass. It's advantages over other composite fin materials include stiffness, a more positive flex pattern (nice tip flex, little base flex) and remarkable flex memory. The precision of the injection moulding process ensures the highest accuracy in geometry in each fin produced. 

So which construction is right for you?

If you’re in the ‘Advance +’ category, you like to push hard through turns, and want a fin that offers immediate response, then our stiffest and most responsive material Performance Glass (PG), or Performance Core Carbon (PCC) construction is right for you.

‘Intermediate +’ surfers will benefit from Performance Core (PC) construction which offers a consistent feel in a range of conditions, and is more forgiving to help you maintain speed as you execute turns.

NEO Glass is a great option for ‘Novice +’ and also ‘Intermediate +’ surfers looking for a more affordable option, but don’t necessarily want to sacrifice on performance. 

Glass Flex (GF) material is perfectly suited to 'Novice +' surfers looking for fin material than can help then comfortably progress with their surfing.

Use the new FCS II Fin Finder to find the fins best suited to your surfing.

Understanding FCS Fin Characteristics

All FCS fins are classified by the following characteristics; Base, Depth, Area and Sweep.

Understanding how these fin characteristics can change the performance of your surfboard is an important consideration when working out which FCS fins are best for you. Each of the following fin characteristics are clearly listed on each each fin page, allowing you to evaluate the impact that a fin design would have on your surfing.

FCS II Fin Base  


Base is the length between the leading and trailing edge where the fin meets the board. Base is primarily linked to drive. Fins with a longer base will offer substantially more drive and acceleration.

FCS II Fin Depth    


Depth is the distance the fin penetrates into the water. Depth directly relates to hold. The greater the depth the more hold, the shorter the depth the more a board will slide and release.

FCS II Fin Sweep   


Sweep is the angle measuring how far the outline of the fin is curved backwards; also referred to as rake. Sweep has a direct influence on pivot. Fins with more sweep produce a longer turning arc, less sweep offers a tighter turning arc.
 FCS-II Fin Area 


Area is the total surface area of the fin.


How Fin Foils Influence Fin Performance

Foils have a major influence on the overall performance of a fin. Foils essentially determine how the water flows across the surface of the fin and directly affect properties such as speed, hold and release.

Inside Foil

FCS Inside Foil

- Rounded leading edge, concave inside face.
- Inside foil increases efficient water flow.
- Adds lift and hold while reducing drag.
- Helps surfers maintain speed through turns.

Flat Foil

FCS Flat Foil

- Even combination of drive, pivot and hold.
- Fast directional changes.
- Preferred by advanced and pro surfers.

50/50 Foil

FCS 50 50 Foil

- Symmetrical foil used on centre fins and sometimes quad rears.
- Even water flow creates stability and control.

80/20 + 70/30 Foil

FCS 80-20 70-30 Foil
- Asymmetrical foil typically used for quad rear fins.
- Allows for fast turning sensitivity while still providing stability and control.

It's really all up to experimentation and seeing what works best for your surfing style. Try a few different combinations, see how your board behaves differently during each surf, and most importantly ....have fun!

The FCS II Fin Finder

Find your perfect FCS fin in under 60 seconds.
Answer 5 simple questions to find the FCS II fins best suited to your surfing.
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FCS Fin Finder Guide




    Filipe Toledo

    Filipe Toledo

    Name: Filipe Toledo
    Date of Birth: 4.16.95
    Born: Ubatuba, Sao Paulo, Brazil
    Lives: California