Drive, speed, and smooth quad control from a split-keel template—built in solid natural Pro Glass for reliable hold and flowing rail-to-rail response.
The 4.7" / 4.25" Controller Split Keel Quad Fin set is designed to deliver the fast projection of a keel with the control and release expected from a modern quad configuration.
Constructed from solid natural Pro Glass, this four-fin set balances stiffness, durability, and consistent flex to suit performance fish, hybrids, and wider-tail shortboards.
The split-keel front fins generate immediate speed and strong down-the-line drive, while the smaller rear pair stabilises the board through turns and maintains smooth release off the top.
This configuration supports powerful carving in open faces while remaining responsive in everyday surf conditions.
Specifications
Front fins Depth (Height) 4.7” Base 5.25” Foil flat inner face Tab 3/4” Area 15.29 sq. inches Rake (Sweep) 33.5 degrees Aspect Ratio 1.44 Cant 5 degrees
Performance Analysis:
Increased Hold: The more a fin leans back, the more it "grips" the water. This is excellent for maintaining control in larger, more powerful surf.
Greater Drive: This fin is designed to help you project speed through long, carving turns rather than pivoting quickly on the spot.
Drawn-out Turns: This rake angle is suited for a surfing style that favors smooth, flowing arcs and stability at high speeds.
Rear fins Depth (Height) 4.25” Base 3.8” Foil flat inner face Tab 1/2” Area 10 sq. inches Rake (Sweep) 16.4 degrees Aspect Ratio 1.8 Cant 4 degrees
Performance Analysis:
Pivot & Maneuverability: A 16.4° rake angle makes this an upright fin. This design focuses on pivot, allowing for very tight, snappy turns and vertical transitions in the pocket of the wave.
Release: Because there is less area behind the base (less sweep), the fin will "release" more easily at the top of a turn, making it ideal for surfers who want a loose, high-performance feel.
Drive vs. Pivot: While the fin will have slightly less "hold" during long, carving power turns compared to a more raked-back fin, it excels in generating speed through quick, short-arc maneuvers.
Key Features
Split-keel quad template for speed with controlled release
4.7" front fins paired with 4.25" rear stabilisers
Solid natural Pro Glass construction for strength and predictable flex
Balanced drive suitable for fish, hybrids, and performance quads
Futures-compatible base system
Supplied as a matched set of four fins
Ideal For
Performance fish and hybrid surfboards
Surfers seeking quad speed with smoother turning control
Medium to larger wave faces requiring projection and hold
Riders transitioning from twin keels to quad setups
Choose these 4.7" / 4.25" Controller Split Keel Quad Fins
This fin set blends traditional keel acceleration with modern quad stability.
The result is dependable speed generation, clean rail engagement, and controlled release—without the overly loose feel common in twin-only configurations.
Solid Pro Glass construction ensures long service life and consistent performance across varied surf conditions.
Compatibility
Compatible with Futures fin box systems.
Eveley Knowledge Hub Guides
Surfboard Fins Australia – Complete Buyer's Guide
Controller Split Keel Quad Fins Guide
Quad Fin Setup Explained: Why Quads Feel Faster (And How to Tune Yours)
Quad Fin Setup Explained – Speed, Setup & When to Ride Quad Surfboard Fins
Best Fins for Small Waves | Generate Speed in Weak Surf
Drive, speed, and smooth quad control from a split-keel template—built in solid natural Pro Glass for reliable hold and flowing rail-to-rail response.
The 4.7" / 4.25" Controller Split Keel Quad Fin set is designed to deliver the fast projection of a keel with the control and release expected from a modern quad configuration.
Constructed from solid natural Pro Glass, this four-fin set balances stiffness, durability, and consistent flex to suit performance fish, hybrids, and wider-tail shortboards.
The split-keel front fins generate immediate speed and strong down-the-line drive, while the smaller rear pair stabilises the board through turns and maintains smooth release off the top.
This configuration supports powerful carving in open faces while remaining responsive in everyday surf conditions.
Specifications
Front fins Depth (Height) 4.7” Base 5.25” Foil flat inner face Tab 3/4” Area 15.29 sq. inches Rake (Sweep) 33.5 degrees Aspect Ratio 1.44 Cant 5 degrees
Performance Analysis:
Increased Hold: The more a fin leans back, the more it "grips" the water. This is excellent for maintaining control in larger, more powerful surf.
Greater Drive: This fin is designed to help you project speed through long, carving turns rather than pivoting quickly on the spot.
Drawn-out Turns: This rake angle is suited for a surfing style that favors smooth, flowing arcs and stability at high speeds.
Rear fins Depth (Height) 4.25” Base 3.8” Foil flat inner face Tab 1/2” Area 10 sq. inches Rake (Sweep) 16.4 degrees Aspect Ratio 1.8 Cant 4 degrees
Performance Analysis:
Pivot & Maneuverability: A 16.4° rake angle makes this an upright fin. This design focuses on pivot, allowing for very tight, snappy turns and vertical transitions in the pocket of the wave.
Release: Because there is less area behind the base (less sweep), the fin will "release" more easily at the top of a turn, making it ideal for surfers who want a loose, high-performance feel.
Drive vs. Pivot: While the fin will have slightly less "hold" during long, carving power turns compared to a more raked-back fin, it excels in generating speed through quick, short-arc maneuvers.
Key Features
Split-keel quad template for speed with controlled release
4.7" front fins paired with 4.25" rear stabilisers
Solid natural Pro Glass construction for strength and predictable flex
Balanced drive suitable for fish, hybrids, and performance quads
Futures-compatible base system
Supplied as a matched set of four fins
Ideal For
Performance fish and hybrid surfboards
Surfers seeking quad speed with smoother turning control
Medium to larger wave faces requiring projection and hold
Riders transitioning from twin keels to quad setups
Choose these 4.7" / 4.25" Controller Split Keel Quad Fins
This fin set blends traditional keel acceleration with modern quad stability.
The result is dependable speed generation, clean rail engagement, and controlled release—without the overly loose feel common in twin-only configurations.
Solid Pro Glass construction ensures long service life and consistent performance across varied surf conditions.
Compatibility
Compatible with Futures fin box systems.
Eveley Knowledge Hub Guides
Surfboard Fins Australia – Complete Buyer's Guide
Controller Split Keel Quad Fins Guide
Quad Fin Setup Explained: Why Quads Feel Faster (And How to Tune Yours)
Quad Fin Setup Explained – Speed, Setup & When to Ride Quad Surfboard Fins
Best Fins for Small Waves | Generate Speed in Weak Surf
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