North Ws MDM Carbon Extension

Maintenance of North Sails MDM Carbon Extension

Rinse the extension with fresh water after each session, especially after use in salt water, and make sure to thoroughly rinse the pulleys, U-Pin button, and Pop & Slide ring to remove salt, sand, and dirt.

Let the product dry completely in the shade or in a well-ventilated area – avoid direct sunlight and heat sources such as radiators, as plastic, steel, and carbon components can all be damaged by intense heat and UV exposure over time.

Regularly check the rope, pulleys, and screws for wear, and lubricating moving parts with a suitable silicone or Teflon lubricant keeps the pulleys running smoothly.

Store the extension in a dry, clean place, protected from direct sunlight – preferably in a mast bag or a spacious storage area, so the carbon tube is not exposed to impacts or heavy loads.

Avoid leaving the product in a hot car or in direct sunlight on the beach for extended periods, as this can shorten the lifespan of the carbon, plastic, and stainless steel components.

What is the North Sails MDM Carbon Extension?

It’s a lightweight carbon extension for windsurf masts that lets you rig faster and apply precise downhaul tension. Carbon is the lightest model in the North Sails MDM range.

Why is carbon better than aluminum for an extension?

Carbon is both lighter and stiffer, making for a more compact extension with better power transfer. It’s the lightest MDM extension made by North Sails.

How easy is it to apply downhaul tension to the sail?

Very easy. The four pulleys provide an 8:1 ratio, and combined with the low-stretch Dyneema line, you can pull on high downhaul tension smoothly and easily, even with a sail size that requires a lot of tension.

How do I adjust the extension length?

The extension ring has a Pop & Slide system that makes adjusting the length quick and intuitive. The U-Pin button on the tube has a manual locking function, so the length won’t change while sailing.

Will the extension fit my sail and mast?

The MDM extension is designed for standard windsurf masts, and the pulleys are positioned in perfect alignment with the sail. Check your mast’s diameter and your sail’s downhaul system if you’re unsure.

What is the extension made of?

The tube is made of carbon, while the other components are made of high-quality plastic and stainless steel, ensuring long-lasting durability and corrosion resistance.

How long is the extension?

This model is 34 cm long.

How do I maintain the extension?

Rinse it with fresh water after use, especially after sailing in salt water, and let it dry in the shade. Store it somewhere dry and protected from direct sunlight to maximize its lifespan.