Duotone Fin Set Tri (Slot|US) (3pcs)

Duotone experience wave‑riding performance at its finest with the new TRI fin set — the ultimate upgrade for any high‑performance tri/thruster wave board. Crafted by fin‑design master Kai Hopf and backed by more than 30 years of innovation alongside the world’s top wave sailors, this set delivers pure, purpose‑built precision. We offer the fins exclusively as a complete set because they were engineered to work in perfect harmony — exactly as Kai intended. While other brands rely on compromise designs that need to work across multiple setups (single, tri/thruster, quad), the TRI fin set is different. It’s a no‑compromise, high‑end solution created to meet — and exceed — the expectations of World Cup‑level riders. In fact, it’s an open secret that many of the sport’s top professionals have been relying on Kai’s custom fin designs for years. Now, that same elite performance is available to every rider. Shorter fins. Higher performance.

One of the key indicators of their efficiency: our fins are 1–2 cm shorter than comparable tri/thruster sets. This is made possible through our exclusive AI_FIN CAD software, which creates a flawless, highly efficient profile transition in the critical tip area where the fin sweeps backward. The benefits? Radically improved manoeuvrability Excellent grip without any sticky feeling Instant, precise response in every turn Premium materials. Maximum perfection. The center fin is precision CNC‑milled from black G10, an ultra‑dense, prepreg‑laminated fiberglass block. G10 is the ideal choice for medium-size maneuver center fins. The side fins are injection molded using our exclusive CARBO_TECH material to ensure the necessary tip flex despite the short length. This is the level of quality and consistency that serious wave sailors expect.

Choosing the right size Select your TRI set according to the recommendations below. Oversized fins generate excessive tail lift, making your board feel sticky and harder to turn. The correct size ensures your board performs exactly as intended — loose, fast, and precise.

This Duotone fin is designed for precise control, grip, and reliable performance in demanding windsurfing conditions.

Order today from Worthing Watersports – the UK’s Duotone specialist store

Tech Features

Super Low Aspect Design: The extra-wide design allows us to shorten the fin length as much as possible without losing surface area. This shortest possible length is the base for all air and spin moves.
ZERO FLEX & TWIST DESIGN: The ZERO FLEX & TWIST DESIGN guarantees maximum release to let you slide smoother through massive double or triple moves.
PROFILE DESIGN: The thicker refined profile results in explosive acceleration and great counter-pressure to enable maximum pop to send you flying higher.
Black G10: G10 is an extremely compressed block of prepreg laminated fiberglass sheets. This block is placed in a CNC milling machine to create the final shape and profile. Advantages:> Due to its high-compression G10 is extremely durable.> Easy to sand, allowing to repair damages caused by ground contact. Best suited for:G10 is the ideal choice for medium-size maneuver center fins.
Injection molded Carbo_Tech: Injection molded fins are manufactured using a metal outside mold. Our exclusive CARBO_TECH material —a proprietary blend of thermoplastic polymer and carbon fibers— is injected into the mold under extremely high pressure and heat. Advantages:> Since this material is softer than G10 it's the ideal choice for shorter maneuver side fins to ensure the necessary tip flex despite the short length. Best suited for:Injection molded fins are the ideal choice for short side fins.
AI_Fin_3D: Our software is based on math data-driven input. Apart from being much more accurate and faster, complex 3D design tasks such as the perfect profile transition in the crucial tip area, where the fin sweeps backward, would otherwise have been impossible to realize. This allows us to cross-check the outcome using artificial intelligence to ensure maximum precision. This is the key secret behind the outstanding efficiency of our fins.
BASE DESIGN: Wide and stiff fin base for direct power transmission.
PROFILE DESIGN: Wave-specific profile, with the max profile depth at 30%, improves the low-end performance and efficiency and results in a wide wind range.
TWIST DESIGN: Progressive twist for tighter radius and improved control during the turn.
FLEX DESIGN: Flexier tip for more grip and control to improve short and radical turns on the wave.
MAX EFFICIENCY DESIGN: We use our own dedicated fin 3d software. This software enables a perfect profile transition in the crucial tip area, where the fin sweeps backward. In accordance with the water flow, the fin width transitions from super narrow to maximum cord width exactly where the fin sweeps backward. Creating a perfectly smooth transition to maintain the maximum thickness of the profile at 30% of the fin width is THE key secret behind the outstanding efficiency of our fins.
OUTLINE DESIGN: Strongly curved leading edge for maximum manoeuvrability.

Brand Video

Tech Spec

Product Code

14260-7243