HD SDM Aluminum Mast Extension (U-Pin) 30
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Unifiber HD SDM Aluminum Mast Extension U-Pin
The Unifiber HD SDM Aluminum Mast Extension U-Pin is an extension designed to offer strength, stability, and reliability under high downhaul tension. It is a suitable solution for windsurfers using performance sails who are looking for a solid, precise component capable of handling demanding setups.
The range is available in multiple sizes, including 10-30 cm and 10-45 cm versions, to suit different trim needs. The aluminum construction, high-strength polyamide base, U-Pin Push Button system, and 8:1 downhaul with 3 pulleys make this extension a technical and functional choice for those who require high tension and ease of use.
Main Features
- Mast extension for SDM masts.
- Available in multiple sizes, including 10-30 cm and 10-45 cm versions.
- Aluminum construction.
- Polyamide base designed to withstand high downhaul tensions.
- U-Pin Push Button attachment system.
- Polyamide Hinged collar.
- 8:1 downhaul system with 3 pulleys.
- 3 pulleys to facilitate downhaul even with more demanding sails.
- Compatible with lines 3.8 - 4.0 mm.
- Recommended line: Pre-stretched Polyester 4.0 mm.
- Adjustment in 25 mm steps.
- Base suitable for comfortable rigging even barefoot.
Product Advantages
Suitable for high downhaul tensions
This extension is designed to perform well when the sail requires significant downhaul. It is a suitable solution for those using higher performance setups and needing a stable and reliable component.
Easier Downhaul
The 8:1 system with 3 pulleys helps reduce the effort required during downhauling. This allows for smoother rigging even for slalom sails or configurations that require sustained tension.
Robust and Functional Structure
The high-quality polyamide base is developed to withstand high loads, while the aluminum tube ensures a good balance of stiffness, weight, and durability. The result is an extension designed for technical and continuous use.
Practical One-Handed Adjustment
The functional length can be easily adjusted thanks to the opening and sliding collar. This makes rigging quicker and improves overall practicality during equipment setup.
Technical Specifications
- Diameter: SDM
- Base Compatibility: U-Pin
- Locking Mechanism: U-Pin Push Button
- Collar: Polyamide Hinged
- Construction: Aluminum
- Reinforcement: Aluminum
- Downhaul System: 8:1 - 3 pulleys
- Pulley Diameter: 19 mm
- Pulley Orientation: 0°
- Line Compatibility: 3.8 - 4.0 mm
- Line: Pre-stretched Polyester 4.0 mm
- Line Length: 200 cm
- Adjustment Step: 25 mm
- Outer Tube Diameter: 44 mm
- Wall Thickness: 1.5 mm
- Operating Weight: 0.515 kg
- Finish: Anodized
- Barefoot Friendly Rigging: Yes
Available Versions
The extension is available in multiple extension variants to suit different trim and configuration needs. The range includes the 10-30 cm, more compact, and the 10-45 cm, suitable for those requiring a greater range.
Ideal for
- Windsurfers using SDM sails with significant downhaul.
- High-performance setups and slalom/freerace configurations.
- Those seeking a robust and reliable SDM extension.
- Those desiring a more efficient and smooth downhaul system.
Q&A
Is this extension compatible with SDM masts?
Yes, this extension is designed for SDM masts.
What sizes are available?
The range includes various sizes, such as 10-30 cm and 10-45 cm versions.
What type of attachment does it use?
This model uses a U-Pin Push Button system.
Is it suitable for sails that require a lot of downhaul?
Yes, this extension is specifically designed to work well with sails that require sustained downhaul tension.
Does the 3-pulley system really help?
Yes, the system with 3 pulleys helps reduce the effort required for downhauling and improves smoothness during rigging.
Is length adjustment practical?
Yes, the sliding collar allows for simple and functional adjustment even during normal rigging operations.
ZZZSURF Shipping and Delivery
Buy with peace of mind: with ZZSURF you get your windsurfing, wingfoil, kitesurfing and watersports products delivered directly to your doorstep, anywhere in the UK and most European countries.
Shipping Times
- Italy: Standard delivery in 24/48 business hours from shipment for most items in stock.
- Europe: delivery in 2-5 business days depending on the country of destination.
- For islands, remote areas or bulky items (boards, SUPs, foils, rigs, masts and booms) delivery time may vary by 1-2 business days.
Shipping Costs
- Italy: Free shipping on orders over $50. For lower orders, a shipping charge may apply.
- EU countries: Cost starts from €24.90 for orders under €200, the price however may vary depending on country and volume of products. The exact calculation is displayed during checkout.
- For bulky products (boards, sails, foils, SUPs, kayaks, etc.) a surcharge may be required. It will always be clearly communicated prior to order confirmation.
Shipping Methods
- We ship with specialized express couriers (GLS, BRT, DHL, UPS, SDA, etc.), selected according to product type and delivery area.
- All products are packed carefully and, where necessary, with reinforced packaging to ensure maximum safety during transport.
- You will receive tracking via email/SMS as soon as the shipment leaves our warehouse.
Pickup at Headquarters
- You can pick up your orders for free at our ZZSURF warehouse in Gallarate Via Mameli 48 (VA) Italy - Please note this is not a store but a pickup point where orders already placed on the site can be picked up.
- You will be notified as soon as your order is ready for pickup.
Important Notes
- Always check the integrity of packages upon delivery and sign with reserve in case of damaged packaging.
- For any doubt or urgency, you can contact our customer service: info@zzsurf.com or WhatsApp directly from the website
- We also ship to Switzerland and UK: contact us for a customized quote.
Methods of Payment on ZZSURF
On ZZSURF, operated by Twoside srl, you can choose from several payment methods, all of which are secure and designed to provide you with maximum convenience:
Credit Cards:
Major credit and prepaid cards are accepted, including Visa, Mastercard and American Express. This method allows you to complete your purchases quickly and securely.
Klarna:
With Klarna you have the option to purchase now and pay off the amount later, choosing from various installment options as needed. A credit card is required to complete payment through Klarna. The maximum amount allowed, including shipping costs, is €1,500.
PayPal:
Paying with PayPal will allow you to make secure and fast transactions without having to re-enter your card information each time. In addition, in some situations, PayPal allows you to split the payment into convenient installments directly from your account.
Bank Transfer:
If you prefer, you can also pay by bank transfer. You will receive all the necessary details when you place your order. Shipment will be made only after verification of receipt of payment.
After placing your order you will need to make the transfer payable to : Twoside srl , IBAN IT74M0326850240052341838010 indicating the order number
Security of Transactions
All payments on ZZSURF are secured using SSL (Secure Socket Layer) technology, which protects your credit card information. During order completion, 3D Secure verification is also activated, which adds an additional layer of security by requiring additional confirmation via web, app or SMS. These measures allow you to shop with confidence.