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  • Maui Ultra Fins X-Tri  - Slot box

Maui Ultra Fins X-Tri 15,5 - Slot box

USD54.92 (inc Tax) USD45.77 (exc Tax)
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Product Description


X-Tri fins are the side fins in a trifin-setup. They are identical to the X-twins but shorter and therefore have less area. Still, the exceptional characteristics in speed, grip and manoeuvrability are achieved. Combined with a single X-Twin, an X-Tri fin set is the ideal configuration for all conditions - Robby Swift´s favourites!

Best suited: All waves, on- and sideshore

X-Tri fins area:

Length (cm) 11,5 12,5 13,5 14,5 15,5
Fin area (cm2) 65 74 83 92 100


Maui Ultra Fins design

Sailboard performance and sailing characteristics are more influenced by the fin than originally thought. Simply speaking, the fin must hold a great part of the sail forces to create a stable and straight ride. Those fin forces must be provided under all sailing conditions and no spin-out should occur.

MUFins airfoil design is based on highly sophisticated engineering methods as they are applied in aircraft wing design. But compared to aircraft wings, fins operate at a much more lower Reynolds number. That‘s why airfoils developed for aircraft wings like the NACA series - although widely used - are not really adequate for fin applications.

In the last 25 years, especially in Germany, modern airfoils have been developed specifically for low Reynolds numbers. MUFins uses this valuable knowledge with some modifications for the new fin development.

The airfoils are optimized with computer programs that can calculate all aerodynamic parameters of importance.

This new approach in designing MUFins sets new standards in fin performance.

MUFfins delivers unmatched stability and speed range, unbelievably upwind performance, they are extremely spin-out resistant, great in jibing and agile on the waves. Nothing else compares.

One ride and you will never look at windsurfing the same again.


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