Ronstan 20 mm Wire Block Nylatron® Sheave

Ronstan 20 mm Wire Block Nylatron® Sheave

19 in stock

The Nylatron® Sheave Wire Block combines low weight with strength. Self-lubricating Nylatron® reduces friction and wear on steel wire or technical fibers and handles high loads without the corrosion associated with metal. Its design ensures smooth, quiet rotation in demanding marine environments. It is the ideal choice for control systems and halyards where protecting the line and reducing equipment weight are priorities.

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At Saildeck Gear, we specialize in technical rigging, blocks, winches, and deck hardware for boats between 30 and 60 feet. We know that every boat is different: working loads, mast dimensions, the type of maneuver, and how you use your boat—cruising, racing, or charter—all affect what you actually need.

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Tell us which product you’re interested in and which boat you’ll be installing it on, and we’ll prepare a quote tailored to your setup, including technical advice and with no obligation.

If you have any questions about compatibility, measurements, or which part is right for your rig, you can also contact us here. We normally respond within 24–48 hours.

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