6" Retro Performance Twin Fins – Black Pro Glass | FCS II Compatible Twin Fin Set

FCSII compatible. Depth 6” Base 5.2” Foil: flat inner face.

The 6" Retro performance twins deliver timeless twin-fin speed, drive, and flow, inspired by late-1970s Australian performance surfing and updated with a modern FCS II compatible tool-free click-in system.

Featuring a tall outline with a solid base, this template generates excellent down-the-line speed and controlled release through longer, drawn-out turns. The black Pro Glass fiberglass construction provides a smooth, predictable flex that loads naturally and releases cleanly—ideal for surfers who value feel over stiffness.

Designed for both retro and contemporary twin-fin surfboards, these fins excel in clean beach breaks and point waves where speed and flow are key.

Key Features

• Retro performance twin-fin template – fast, drive-oriented, and fluid

• 6" height – added hold and control compared to smaller twins

• Black Pro Glass fiberglass – smooth, responsive, and durable flex

• Wide base with high profile – excellent projection and speed

• FCS II compatible – tool-free click-in installation

• Set of two fins – twin-fin configuration

Ideal For

• Retro and modern twin-fin surfboards

• Surfers chasing speed, flow, and classic twin feel

• Clean beach breaks, point waves, and open faces

• Riders who prefer drawn-out, powerful turns over snappy pivots

Why Choose These Fins?

The Retro performance twin outline remains one of the most trusted twin-fin templates ever created. Paired with Pro Glass flex, it delivers a more organic, connected feel than overly stiff composite fins—perfect for twins where flow and release matter most. The FCS II compatible system adds modern convenience with secure, tool-free installation.

Will This Fit My Board?

Yes. These fins are FCS II compatible and will fit any surfboard with FCS II fin boxes designed for a twin-fin setup. No fin key or screws required.

FAQs

Are these fins sold as a pair?
Yes. This product is a set of two fins, designed specifically for twin-fin surfboards.

Do these fins require screws or tools?
No. The FCS II compatible system allows for tool-free click-in installation.

How does Pro Glass compare to carbon or honeycomb fins?
Pro Glass offers a smoother, more natural flex, ideal for twin fins where controlled release and feel are more important than stiffness.

We include:

Free Delivery: Everywhere in Australia.

Tracking: Quick & easy online tracking on all fins. 

Peace of Mind: All our fins are insured against loss in transit.

Prompt Australian Dispatch: All items are sent from stock held in Sydney on the same or next business day.

Returns: 30-day, no questions asked returns, for unused full price items.

No More to Pay: No surcharges added at the checkout.

Enjoy faster Express Shipping for just $10 per order at checkout.