X-Over Fin Powerbox
The GUNSAILS X-Over Fin is your go-to choice for variable conditions – whether you're riding choppy lakes or enjoying small waves on coastal spots. Inspired by the Power-Wave Fin, the shape has been completely reworked into a dedicated X-Over Freemove design – ideal for bump and jump sessions with plenty of sail pressure.
The thin profile and stiff base section ensure early planing and top-end speed, while the more flexible tip in larger sizes gives you added control in tight gybes and snappy turns – exactly what you need in unpredictable, high-wind conditions.
Your setup for windy action: Whether it’s gusty inland lakes or messy waves, the X-Over Fin gives you reliable grip, precision and control – whenever and wherever you push it.
Key features:
- Thin profile & stiffness – for fast planing and high speeds
- Controlled flex in the tip – for precise gybes and quick turns
- Perfect for freewave boards & high-wind bump and jump
Grab the GUNSAILS X-Over Fin and ride with confidence in any high-energy freeride session.
Note: The fin size is given in millimetres and refers to the fin’s depth.
Find the right fin for your setup.
Our Fin Selector shows you at a glance which fin length matches your board volume, sail size or rider weight. It’s the easiest way to choose the ideal model for your riding style and local conditions.
| Board Volume | Sail Range | Setup | Fin Configuration |
|---|---|---|---|
| 120l | Sail Range | Single | 310 |
| 120l | 4,7 – 7,5 | Twin | 290 |
| 120l | 4,7 – 7,5 | Thruster | 270 + 120 |
| 110l | Sail Range | Single | 310 |
| 110l | 4,5 – 7,0 | Twin | 270 |
| 110l | 4,5 – 7,0 | Thruster | 250 + 120 |
| 100l | Sail Range | Single | 290 |
| 100l | 4,2 – 6,6 | Twin | 250 |
| 100l | 4,2 – 6,6 | Thruster | 230 + 120 |
| 90l | Sail Range | Single | 290 |
| 90l | 3,7 – 6,0 | Twin | 250 |
| 90l | 3,7 – 6,0 | Thruster | 230 + 120 |
| 80l | Sail Range | Single | 270 |
| 80l | 3,2 – 5,7 | Twin | 250 |
| 80l | 3,2 – 5,7 | Thruster | 210 + 100 |
Note:
Reference values are based on a rider weight of 80 kg.
± 10 kg body weight equals ± 20 mm in fin length.
The ideal length also depends heavily on rider skills, gear setup and spot conditions.









