Aluminium Mast Extension HD SDM U-Pin 45cm Unifiber UF030035070

Aluminium Mast Extension HD SDM U-Pin 45cm Unifiber UF030035070

Description:

The Unifiber Aluminium Mast Extension HD SDM U-Pin 45cm is a heavy-duty mast extension designed to deliver reliable, high-tension downhaul for demanding windsurfing rigs. Constructed around a robust aluminium shaft with a high-quality polyamide base, it combines strength with a lightweight feel for efficient handling. A 3-roll pulley significantly reduces the effort required to downhaul even slalom sails, while the HD SDM design is optimized for short-mast systems and high-load applications. The open-and-slide collar allows rapid one-handed adjustment of the functional length, making rig tuning fast and precise on the water. Built for durability and repeated high-tension use, this extension resists deformation under load and keeps lines running smoothly during competition or intensive sessions. Its U-pin fitting ensures simple, secure attachment to SDM-style masts and compatible rigs.

Key Features:

• Aluminium shaft for high strength-to-weight performance
• High-quality polyamide base engineered to withstand heavy downhaul tension
• 3-roll pulley reduces user effort and smooths line movement under load
• HD SDM design tailored for short-diameter mast systems and slalom sails
• U-pin attachment for quick, secure mounting to compatible masts
• Open-and-slide collar enables one-handed functional length adjustment
• Durable construction intended for frequent, high-stress use
• Ideal for high-tension rigs where precise, consistent downhaul is critical

Specifications:

Manufacturer: Unifiber
SKU: UF030035070
Material: Aluminium shaft with high-quality polyamide base; 3-roll pulley system
Size/Dimensions: 45 cm functional length (adjustable via collar)
Weight: Not specified by manufacturer
Color: Natural aluminium finish with polyamide base (may vary)
Size: 45cm
Category: Mast Extensions
Age Group: Adults
Gender: Unisex

Recommended Use:

This mast extension is ideal for advanced and professional windsurfers, particularly slalom and high-performance racers who require strong, reliable downhaul tension. Best suited for competitive slalom rigs and high-tension sail setups in onshore, offshore, or gusty conditions where precise sail tuning matters. Pair with SDM-compatible masts and robust downhaul lines/cleats to maximize performance and longevity.