STCo Fiberglass Keel Fins – Hand-Finished Twin-Fin Set, Futures Compatible

Overview

Classic keel design. Modern performance. More speed and drive.

The STCo Fiberglass Keel Fins are designed for surfers who want speed, control, and smooth, flowing turns from their twin-fin setup. Inspired by the classic keel outline with modern refinements, these fins combine traditional twin-fin character with hand-finished fiberglass construction.

Featuring a stiff flex profile, the STCo Keel Fins are designed to provide a firm, controlled feel through turns while supporting drive and trim across the wave face. They're suited to both modern and retro-inspired twin-fin surfboards, making them a versatile choice for surfers who enjoy speed and sweeping lines.

A popular option in the STCo lineup, these fins offer a classic-inspired design for surfers seeking a confident, responsive twin-fin experience.

Key Features & Benefits

• Classic Keel-Inspired Shape: Combines traditional keel styling with modern refinements for twin-fin surfboards.

• Hand-Finished Fiberglass Construction: Offers a carefully finished design with the characteristic feel of fiberglass fins.

• Stiff Flex Profile: Provides a firm, controlled response for surfers who prefer less fin flex.

• Speed and Drive: Designed to help generate speed and maintain momentum across the wave face.

• Smooth, Sweeping Turns: Suited to flowing turns and longer lines rather than a highly pivot-oriented fin style.

• Control and Trim: Designed to support stability and directional control while maintaining speed.

• Futures Fin-Box Compatibility: Intended for compatible Futures fin boxes.

• Suitable for All Skill Levels: An option for beginners through advanced surfers when matched to the correct board and fin setup.

Speed Across the Wave

The keel-inspired design is intended to support speed and momentum, making these fins a natural choice for surfers who enjoy driving down the line.

Flowing Turns and Trim

The classic outline is designed for smooth, sweeping turns and sustained trim, helping create the flowing feel associated with twin-fin surfing.

Stiff, Controlled Response

The stiff flex profile provides a firmer feel under load. The resulting performance will depend on fin dimensions, board design, rider technique, and wave conditions.

Hand-Finished Fiberglass

Fiberglass construction and hand finishing give these fins a classic surfboard accessory aesthetic with a carefully finished appearance.

Technical Specifications

Compatibility & Installation

These fins are designed for compatible Futures fin boxes. Confirm the fin-base type and dimensions required by your surfboard before ordering, as fin systems are not universally interchangeable.

Install the fins using compatible mounting hardware and follow your surfboard manufacturer's instructions. Check that both fins are correctly secured before entering the water.

Get Your Twin-Fin Setup Dialed In

Choose the STCo Fiberglass Keel Fins for a classic-inspired twin-fin design focused on speed, drive, control, and smooth, flowing turns.