North Sails MDM extensions are designed to help you spend less time rigging and more time sailing. The Aluminum model is the carbon alternative, offering the same innovative features.
Includes four large, low-friction, corrosion-resistant, and easy-to-thread plastic sheaves that align perfectly with the sail pulleys. Combined with low-stretch Dyneema rope , they achieve a sheave ratio of 8:1 , making it easy to tension the tack precisely and effortlessly.
The extension ring features an intuitive Pop & Slide system, allowing for quick and precise length adjustment. The U-Pin locking button is discreetly integrated into the tube and offers a manual locking function for added security and peace of mind, even during long slalom runs or open water crossings.
High-quality engineering plastic and stainless steel components ensure a long service life for your equipment.
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