The Split Keel Quad is a high-area specialty quad fin set.
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The Split Keel Quad is a high-area specialty quad fin set designed to add bite, control, and stability without sacrificing the pivot and flow surfers love from twin-style setups.
Featuring an upright keel template, this fin set is ideal for traditional fish shapes and modern hybrid boards, delivering a fast, responsive feel while maintaining strong hold through turns. The split keel design provides the speed and drive of a twin, while the quad configuration adds extra control and precision when pushing harder through sections.
Features & Benefits
- Specialty split keel quad fin set
- High surface area for added bite and control
- Upright keel template for pivot and responsiveness
- Ideal for wide-tail hybrid and fish boards
- Balances speed, drive, and manoeuvrability
Performance Feel
The Split Keel Quad set is designed to combine twin-fin speed with quad-fin control.
The high-area keel template generates excellent drive and down-the-line acceleration, while the split quad configuration increases hold when driving through turns. This allows surfers to maintain speed while still performing tight pivots and directional changes.
The result is a setup that feels fast, stable, and responsive, making it perfect for surfers who want extra control on wide-tail boards without losing the loose feel of a twin-inspired setup.
Fin Template: Split Keel Quad
Twin-inspired speed with quad control.
The upright split keel template is designed for surfers who want the drive and flow of a keel fin combined with the control and stability of a quad setup, making it ideal for modern fish and hybrid surfboards.
Ideal Conditions
Performs particularly well in:
- Beach breaks
- Point breaks
- Small to medium surf
Board Compatibility
- Designed to fit the FCS II Fin System.
- Recommended for modern fish and hybrid boards with moderate-to-low rocker.
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Performance Glass
For decades, solid fibreglass fins have been the preferred construction for many of the world’s best surfers.
Performance Glass fins are CNC machine-cut from layered sheets of fibreglass and resin, producing highly accurate foils that are then hand-finished for precision and performance.
This construction creates a stiff, dependable flex pattern that maintains its integrity even under immense pressure, making PG fins ideal for powerful surfing.
The result is a fin that delivers instant response, strong drive, and exceptional control when you push your board to its limits.
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L-XL: (Above 85kg / Above 176 Lbs)
Fin Base (inches)
Base (mm)
Depth (inches)
Depth (mm)
Area (inches)
Area (mm)
Sweep Deg°
Foil
Side 5.41 137.3 4.79 121.5 19.27 12432 42.5° Flat Q-Rear 4.03 102.2 4.40 118.8 12.63 8150 28.5° 80/20
View the FCS Fin Data page for Base/Depth/Area/Foil information.