High-area performance quad fin set engineered for powerful surfers, larger boards, and maximum drive with controlled release.
The 5.2" / 4.35" Big Boy Quad Fins are designed to deliver dependable hold, projection, and stability for surfers requiring increased surface area and control. Constructed from durable black Pro Glass, this quad set provides a direct, responsive feel suited to committed turns and higher-speed surfing.
The larger front fins generate strong drive through bottom turns, while the balanced rear fins maintain controlled release and directional stability. This configuration supports confident performance in everyday surf as well as more powerful conditions where additional fin area becomes essential.
Compatible with FCS II fin box systems, the set installs without tools while maintaining secure engagement for regular surf use.
This quad set emulates the original HI-1 quads, but made from superior Pro Glass for the serious surfer.
Specs
Front fins Depth 5.2” Base 5” Rear fins Depth 4.35” Base 4.35” Foil flat inner face on all fins.
These are solid fiberglass fins with a machined finish.
Key Features
Large-area quad template for enhanced hold and projection
5.2" front fins with 4.35" rear fins for balanced quad performance
Black Pro Glass construction providing stiffness, durability, and direct response
Drive-focused design suited to powerful turns and higher speeds
Controlled rear-fin release to maintain manoeuvrability
FCS II compatible base for secure, tool-free installation
Set of four fins for complete quad configuration
Ideal For
Heavier surfers or riders needing greater fin surface area
Performance quads, step-ups, and boards with added volume or width
Surf conditions requiring hold, drive, and stability at speed
Beach breaks, points, and reefs where controlled projection is critical
Choose 5.2" / 4.35" Big Boy Quad Fins
Increased fin area delivers confidence under pressure
Balanced quad sizing maintains drive without excessive stiffness
Pro Glass construction ensures consistent flex and durability
Reliable everyday quad option for larger or more powerful surfing
Compatibility
Fits FCS II fin box systems.
Not manufactured by or affiliated with FCS.
Summary
The 5.2" / 4.35" Big Boy Quad Fins are a large-surface-area Pro Glass quad set built for drive, hold, and controlled release in performance quad surfboards. Designed for heavier surfers, larger boards, and stronger conditions, they provide dependable projection and stability with FCS II tool-free compatibility.
Click here to see The Quad Fin Setup Guide
High-area performance quad fin set engineered for powerful surfers, larger boards, and maximum drive with controlled release.
The 5.2" / 4.35" Big Boy Quad Fins are designed to deliver dependable hold, projection, and stability for surfers requiring increased surface area and control. Constructed from durable black Pro Glass, this quad set provides a direct, responsive feel suited to committed turns and higher-speed surfing.
The larger front fins generate strong drive through bottom turns, while the balanced rear fins maintain controlled release and directional stability. This configuration supports confident performance in everyday surf as well as more powerful conditions where additional fin area becomes essential.
Compatible with FCS II fin box systems, the set installs without tools while maintaining secure engagement for regular surf use.
This quad set emulates the original HI-1 quads, but made from superior Pro Glass for the serious surfer.
Specs
Front fins Depth 5.2” Base 5” Rear fins Depth 4.35” Base 4.35” Foil flat inner face on all fins.
These are solid fiberglass fins with a machined finish.
Key Features
Large-area quad template for enhanced hold and projection
5.2" front fins with 4.35" rear fins for balanced quad performance
Black Pro Glass construction providing stiffness, durability, and direct response
Drive-focused design suited to powerful turns and higher speeds
Controlled rear-fin release to maintain manoeuvrability
FCS II compatible base for secure, tool-free installation
Set of four fins for complete quad configuration
Ideal For
Heavier surfers or riders needing greater fin surface area
Performance quads, step-ups, and boards with added volume or width
Surf conditions requiring hold, drive, and stability at speed
Beach breaks, points, and reefs where controlled projection is critical
Choose 5.2" / 4.35" Big Boy Quad Fins
Increased fin area delivers confidence under pressure
Balanced quad sizing maintains drive without excessive stiffness
Pro Glass construction ensures consistent flex and durability
Reliable everyday quad option for larger or more powerful surfing
Compatibility
Fits FCS II fin box systems.
Not manufactured by or affiliated with FCS.
Summary
The 5.2" / 4.35" Big Boy Quad Fins are a large-surface-area Pro Glass quad set built for drive, hold, and controlled release in performance quad surfboards. Designed for heavier surfers, larger boards, and stronger conditions, they provide dependable projection and stability with FCS II tool-free compatibility.
Click here to see The Quad Fin Setup Guide
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