4.17" Dynamic Side Fins – FCS II compatible volan Pro Glass (2 fins)

Responsive Volan Pro Glass surfboard fins that add drive, rail hold and control to longboards and mid-lengths.

These surfboard fins are designed for surfers who want more drive, stability and turning control from a 2+1 longboard or performance mid-length.

Choose these side fins when you want:

• More hold when putting the board on rail

• Faster, more responsive direction changes

• Added stability in steeper or faster waves

• Smooth, predictable Volan Pro Glass flex

• FCS II-compatible side fins with tool-free installation

• A matched left-and-right set of Eveley fins

Best suited to:

• Performance longboards

• Mid-length surfboards

• 2+1 fin configurations

• Thruster-style longboard setups

• Small to medium surf

• Surfers who prioritise control and responsiveness over a traditional single-fin feel

The 4.17-inch Dynamic template provides more influence than smaller side bites, helping the board hold through turns without making it feel excessively stiff. The flat inside foil supports efficient acceleration and dependable rail engagement.

Technical Specs

• Fin type: Dynamic side fins

• Set includes: Two fins—one left and one right

• Size: Each fin is 4.17 inches deep with a 4-inch base

• Construction: Natural-coloured Volan Pro Glass fibreglass

• Foil: Flat inside face for controlled water flow and reliable drive

• Flex: Smooth, predictable medium flex

• Compatibility: Fits FCS II-compatible fin boxes

• Best for: 2+1 longboards, performance longboards and mid-length boards

• Recommended surf: Small to medium waves

• Installation: Pushes into compatible FCS II fin boxes without tools

FCS™ and FCS II™ are registered trademarks of Surf Hardware International Pty Ltd. Eveley Surf is not affiliated with or endorsed by Surf Hardware International Pty Ltd. All compatibility references to FCS and FCS II are for descriptive purposes only.

Eveley Surfboard Fin Knowledge Hub

Learn more about choosing and setting up side fins and other surfboard fins:

• Do Side Fins Help Longboard Performance?

• Longboard Fin Setup Guide—Single Fin, 2+1 and Performance Options

• Surfboard Fin Materials Guide—Fibreglass, Honeycomb and Carbon

• Surfboard Fins Australia—Complete Buyer’s Guide