FCS II H4 Tri Fins

The H4 looks and surfs different to any other fin. Precision Swiss engineering matched with a highly evolved template provides an unprecedented level of control and predictability at high speeds.

Rated 4.9 out of 5

Based on 56 reviews

$160.00

Performance
Material
Size

Overview

UNIQUE TEMPLATE

Radically different side & center fin templates create a powerful fin set with ultimate speed & drive.
- Side Fin Profile: Lower section produces maximum acceleration, while hatchet like tip creates stability & control.
- Center Fin Profile: Highly raked elliptical outline reduces drag, and offers feeling of predictability when releasing through turns.
- Fin Foils Template: Thicker base with tapered tip optimizes flex & regulates the release of energy during rail to rail transitions.
Ideal Conditions
- A wide range of conditions, particularly good in critical overhead waves.
Board Types
- Designed to fit the FCS II Fin System.
- Recommended for performance shortboards with moderate-to-low rocker.
Fin Family
- Accelerator: Find Control. Speed, flow and response with added control.
NEW CONSTRUCTION
- Precision Swiss Engineered: Creates perfect synergy between fin geometry & HI-FI materials, giving smooth & predictable feel.
- High Density Uni-Directional Carbon Fibre: Light & super strong with custom orientation to transfer more of your energy into speed than any other fin.
- Dynamic Trailing Edge: Internal composite morphs under extreme load, enabling the fins to be pushed harder without sliding out.
- Innovative Production: Highly specialized robotic automation combined with camera assisted quality control, ensures absolute accuracy.

SMALL (55Kg - 70Kg / 120 - 155 Lbs)
MEDIUM (65Kg - 80Kg / 145 - 175 Lbs)
LARGE (75Kg - 90Kg / 165 - 200 Lbs)

Fin	Base (inches)	Base (mm)	Depth (inches)	Depth (mm)	Area (inches)	Area (mm)	Sweep Deg°	Foil
SML Side	4.36	110.6	4.34	110.1	14.29	9221	38.3°	Flat
SML Ctr	4.29	108.8	4.49	113.9	13.82	8917	37.2°	50/50
MED Side	4.48	113.6	4.45	113.0	15.07	9721	38.3°	Flat
MED Ctr	4.40	111.7	4.61	117.0	14.58	9405	37.2°	50/50
LRG Side	4.59	116.5	4.57	115.9	15.84	10221	38.3°	Flat
LRG Ctr	4.52	114.6	4.73	120.0	15.33	9893	37.2°	50/50

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

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average rating 4.9 out of 5

Based on 56 reviews

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56 Reviews

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Reviewed by Kate H., from Australia

Verified Buyer

I recommend this product

Surfing Ability

Advanced

Board Type

Performance
Step Up

Rated 5 out of 5

Review posted

H4s hit sections other fins can’t reach

VW Golf or Toyota Yaris? That’s the difference in speed, handling and cost for my H4s compared to my trusty KA Mediums….

I’ve gone back to KA time and time again after dabbling with MF, JW, PC and Neo Glass Performers and JS but these H4 Small are next level Joy of Surfing!

Smooth like a knife through butter, fast and drivey like a turbo under your feet and so easy to turn, you kinda don’t even contemplate your line being disrupted by a wiggle, a rail bog, catch or feeeling your toes crushing your deck as you try to keep up enough pressure!

Get them, they’re worth it.

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Reviewed by Alexander W., from Australia

Verified Buyer

I recommend this product

Surfing Ability

Advanced

Board Type

Performance

Rated 5 out of 5

Review posted

FCS 2 H4 Large

Love them! Feel super fast from take off! Slingshot speed and great control!

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Reviewed by Nathan G.

Verified Buyer

I recommend this product

Rated 5 out of 5

Review posted

Hi tech that delivers

best all around fin i have used. Great combination of speed and control. Hold very well in hollow waves.

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Reviewed by Lula C.

Verified Buyer

I recommend this product

Rated 5 out of 5

Review posted

Best fins I have had

So much flow and speed with the H4 fins set!

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Reviewed by Oliver W., from Australia

Verified Buyer

I recommend this product

Surfing Ability

Experienced

Board Type

Funboard
Performance

Rated 5 out of 5

Review posted

Tech as feel

Dope new design. Goes well in a few different boards. Particularly loves it when it’s overhead with plenty of push.

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