SPECS
| Size | Luff (cm) | Boom (cm) | Rec. Mast | Printed Spec | Head | Battens | Cams |
| 4.0 | 364 | 151 | RDM 340/370 | 340 + 24 | Vario | 4 | 0 |
| 4.2 | 370 | 154 | RDM 370 | 370 + 0 | Vario | 4 | 0 |
| 4.5 | 380 | 156 | RDM 370 | 370 + 10 | Vario | 4 | 0 |
| 4.7 | 388 | 160 | RDM 370 | 370 + 18 | Fixed | 4 | 0 |
| 5.0 | 400 | 164 | RDM 400 | 400 + 24 | Fixed | 4 | 0 |
| 5.3 | 414 | 170 | RDM 430 | 430 + 4 | Fixed | 4 | 0 |
| 5.7 | 422 | 176 | RDM 430 | 430 + 20 | Fixed | 4 | 0 |
Details
A refined head shape for tighter control and improved stability. Upgraded batten system for better tension and locked-in shape. The open leech keeps it manageable at speed, while the new batten tensioner makes tuning simple and bombproof. Light. Tough. Rock solid under load. Side onshore, side shore, or side offshore… This sail adapts. Carve lines. Launch aerials. Hack and punt.
The Force 4 delivers smooth handling and instant response. It’s clean. It’s light. It’s reliable. Handles gusts. Forgives mistakes. Built for power, tuned for flow. Go harder with confidence in every turn.
Features
Versatile Wave Performance
Excels in all wave conditions, the 4 Batten Moderate-to-Low Aspect Ratio Platform optimizes control and maneuverability in dynamic surf.
Extended Wind Range
Improves top-end power and control, a Light Feeling Between Hands with an Excellent Wind Range ensures responsiveness in all conditions.
Lightweight & Durable Build
Maximizes maneuverability and strength the XS-1577 Ultra Lightweight Scrim Construction reduces weight while maintaining peak performance.
Enhanced Stability and Performance
Provides a locked-in ride, the 3D Shaping Technology with Carbon Air Frame delivers a lightweight yet rigid structure.
Superior Stiffness & Durability
Enhances longevity and responsiveness, the X-Ply Construction reinforces the sail’s framework.
Clear Visibility & Reinforced Strength
Improves sightlines and resilience, the SpectraView Window provides clarity while increasing durability.
Customizable Power Control
Adjusts based on rider preference, the 2 Position Titanium Clew Ring offers versatility in tuning.
Ultra-Responsive Handling
Spreads load evenly for a tight, locked-in feel, the Carbon Airframe Window ensures precise and efficient power distribution.
Optimized Rotation & Weight Reduction
Enhances durability and smooth transitions, the Equilibrium Batten Pockets reduces weight while improving performance.
Compact, Strong Batten System
Improves structure and longevity, the New Batten Tensioner makes the sail lighter, stronger, and more efficient.
Rugged & Reliable Mast Sleeve
Withstands extreme conditions, the Tough Mast Sleeve Construction reinforces durability in high-impact environments.
