Aluminium Mast Extension HD SDM U-Pin 30cm Unifiber UF030035065

Aluminium Mast Extension HD SDM U-Pin 30cm Unifiber UF030035065

Description:

The Unifiber Aluminium Mast Extension HD SDM (30 cm) is a heavy-duty windsurfing mast extension designed to deliver reliable, high-tension downhaul for demanding sails such as slalom rigs. Its aluminium body combined with a high-quality polyamide base provides a durable yet lightweight construction that resists deformation under load. An integrated 3‑roll pulley significantly reduces the effort required to tension the downhaul, while the open-and-slide collar allows quick one‑hand adjustment of the functional length. The U-pin fastening ensures secure attachment to SDM masts and rig components. Built for performance and longevity, this extension gives riders precise, repeatable downhaul control so they can optimize sail shape and drive in high-wind or racing conditions.

Key Features:

• Heavy-duty aluminium body for strength and reduced flex
• Polyamide base engineered to withstand high downhaul tension
• 3-roll pulley system reduces required downhaul effort
• Open-and-slide collar for one-handed, fast length adjustment
• Secure U‑pin fastening for reliable mast attachment
• Designed specifically for SDM (small-diameter mast) compatibility
• Robust construction for consistent performance in demanding conditions
• Improves sail tuning precision and reduces rider fatigue during rigging

Specifications:

Manufacturer: Unifiber
SKU: UF030035065
Material: Aluminium body with high-quality polyamide base; U‑pin and pulley hardware (metal)
Size/Dimensions: 30 cm functional extension length
Weight: Not specified by manufacturer
Color: Aluminium finish with polyamide base
Category: Mast Extensions
Age Group: Adults
Gender: Unisex

Recommended Use:

Ideal for advanced and professional windsurfers, racers, and slalom riders who need precise, high-tension downhaul control. Best suited for slalom and high-performance sails in strong wind or racing conditions where reliable sail shaping is critical. Pairs well with SDM masts and high-tension rigging hardware; recommended for use with compatible downhaul ropes and rigging accessories.