The Unifiber Elite SDM V2 Carbon Mast Extension (U-Pin) is a high-performance component designed for demanding windsurfers, racers, and high-speed freeriders.

Constructed with a pre-preg carbon tube, it delivers exceptional stiffness and low weight, improving power transfer and overall rig responsiveness. The direct connection to the stainless steel base ensures a solid, flex-free setup even under extreme downhaul loads.

The 3-pulley system provides an 8:1 mechanical advantage, making it easy to downhaul even high-tension race sails. The open-and-slide adjustment collar allows quick one-handed trimming, while the flat base design ensures comfort when rigging barefoot.

Engineered for demanding conditions, this extension is ideal for riders who need precision, durability, and maximum performance on the water.

Key features

• Pre-preg carbon tube for maximum stiffness and low weight
• Stainless steel base for direct and durable connection
• 3-pulley system with 8:1 downhaul ratio
• Open & slide collar for one-hand adjustment
• Flat base for barefoot-friendly rigging
• Compatible with SDM masts and U-Pin systems
• Optimized for racing and high-performance sails

Technical specifications

• Mast compatibility: SDM
• Locking system: U-Pin push button
• Extension range: 4 – 32 cm
• Downhaul ratio: 8:1
• Number of pulleys: 3
• Pulley diameter: 15 mm
• Tube wall thickness: 3 mm
• Materials:
  • Tube: pre-preg carbon
  • Base: stainless steel
• Rope: Dyneema 4.0 mm (compatible 3.8 – 4.0 mm)
• Weight: approx. 0.59 kg