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Core Blocks

Red Dot Core Block Award






Use them anywhere

CORE BLOCKS™ are a true all round solution. A tuned 2-stage bearing system provides excellent performance across the full working load range with an integrated thrust bearing feature and the resilience to handle high dynamic or static loads. Acetal & aluminium sheave options, alloy cheeks and stainless fixings complete the durable package. For reliability and a long service life, these blocks are the right choice for sheets, halyards and control line applications for cruising and racing.

Half the friction

Ronstan Core Blocks™ have half the friction, or less, compared to the nearest competitor; a feature that delivers easier and safer sailing, particularly when short-handed or cruising with the family.

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