6" Retro MR Twin Fins – Black Pro Glass | FCS II Compatible Set of two fins

Fast, flowing twin-fin drive with modern tool-free convenience. Retro performance twin in an FCS II compatible click-in system.

The 6" Retro MR 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.

Specs

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

Key Features

• Retro MR 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

Choose MR Retro Twin Fins

The MR Retro 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.

Twin Fin Surfing Guide: Speed, Flow, Keels vs Upright Twins Explained