The Unifiber Elite SDM V2 Stainless Steel Mast Extension (U-Pin) is built for maximum durability and consistent high performance in demanding windsurf conditions.

The anodized T6 aluminum tube combined with a corrosion-resistant stainless steel base creates a rigid and direct connection between mast and baseplate. This ensures excellent stability and control even under extreme downhaul loads typical of freerace and race sails.

The 3-pulley system with an 8:1 ratio allows you to apply high tension with less effort, making rigging easier and more precise. The stainless steel open-and-slide collar enables quick one-handed adjustment, even in harsh conditions or when wearing gloves.

The flat base design is barefoot-friendly, while the reinforced stainless steel components ensure long-term durability and resistance to saltwater corrosion.

Ideal for intermediate to advanced riders looking for a strong, reliable, and performance-oriented extension.

Key features

• High-strength anodized T6 aluminum tube
• Corrosion-resistant stainless steel base and components
• Direct and rigid connection for maximum control
• 3-pulley system with 8:1 downhaul ratio
• Open & slide collar for quick one-hand adjustment
• Flat base for barefoot-friendly rigging
• Compatible with SDM masts and U-Pin systems
• Designed for freerace, racing, and heavy conditions

Technical specifications

• Mast compatibility: SDM
• Locking system: U-Pin push button
• Extension range: 4 – 32 cm
• Adjustment increment: 20 mm
• Downhaul ratio: 8:1
• Number of pulleys: 3
• Pulley diameter: 15 mm
• Outer tube diameter: 47 mm
• Tube wall thickness: approx. 2.5 mm
• Materials:
  • Tube: anodized T6 aluminum
  • Base: stainless steel
  • Collar: stainless steel
• Rope: Dyneema 4.0 mm (compatible 3.8 – 4.0 mm)
• Weight: approx. 0.85 kg