Ronstan Series 100 Stand-Up Core Block™

Ronstan Series 100 Stand-Up Core Block™

17 in stock

Ronstan Core Blocks™ are high-strength blocks built for high static loads. Self-lubricating composite bearings give durability and minimal maintenance under extreme tension – ideal for halyards, vangs and backstays, where structural reliability is critical. A spring keeps the block standing upright when the line goes slack, so it never lies on the deck and is always ready to take load.

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At Saildeck Gear we specialise in technical rigging, blocks, winches and deck hardware for yachts from 30 to 60 feet – and we know that every boat is different. Working loads, mast dimensions, deck layout and how you sail (cruising, racing or charter) all change what you really need.

That’s why we don’t publish a fixed price on the product page: we’d rather talk to you first.

Tell us which product you’re interested in and which boat it’s going on, and we’ll prepare a quote tailored to your set-up, with technical advice included and no obligation.

If you have any questions about compatibility, dimensions or which part is right for your rig, you can also get in touch here. We normally reply within 24–48 hours.

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