JS x MFC Keel & Twin Fin Tech Talk

Our JS Industries x MFC Hawaii collaboration is one of the only fin constructions in the surfing world to use epoxy resin instead of poly resin. And in our endless pursuit of going as fast as possible on a wave, we found this layup to be the best and most reliable. The JS Keel made for our Red Baron and the JS Twin made for our Black Baron.

AUS - www.jsindustries.com/hardware/fins
USA - us.jsindustries.com/hardware/fins

The fin construction includes a Soric SF2 core to reduce weight and provide stiffness, then two layers of 200gr external carbon, one layer of 120gr glass, and RTM technology featuring epoxy resin instead of polyester.

Epoxy fins vs polyester fins

1. Epoxy fins are more reactive, meaning a faster response time.
2. Epoxy resin has a longer life during usage.
3. Epoxy has a load of approx. 1800/2000lb x square inch vs 500/600lb x square inch of the poly resin.
4. Consequently, at high speed the epoxy fin is more reactive because it’s able to handle the extra load. When the fin flexes it comes back faster, giving you a stronger spring back.
5. Shelf life is longer. After a bit of time the poly fins become softer and lose their flexibility properties, while epoxy has a much longer life both in storage and in the water.

It’s become clear through team testing that when surfers jump on epoxy fins, they feel the difference immediately. At the beginning they need to adapt to the reactivity of the epoxy or epoxy-carbon combo, but then when they start to push hard through turns, the fins follow the rider increasing speed.

During MFC’s most intense round of R&D, the epoxy-carbon fins for Pe’ahi reached 42/44mph on the paddle guns, and 50mph on the Tow Sessions. This would not have been possible with poly fins, even if we would have used carbon. Poly resin simply does not have the properties to handle this level of speed without vibrating.

Видео JS x MFC Keel & Twin Fin Tech Talk канала JS Industries