{"product_id":"lewmar-50mm-synchro-double-block","title":"Lewmar 50mm Synchro Double Block","description":"\u003cp\u003e\u003cstrong\u003eLewmar 50mm Synchro Double Block\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThe Lewmar Synchro Block Double provides smooth, efficient load handling with added mechanical advantage for performance sailing systems. Its twin-sheave configuration delivers low-friction operation and responsive control, ideal for trimming and control-line applications. Built with Lewmar’s advanced Synchro bearing technology and durable marine-grade materials, the block offers reliable strength and long-term performance in demanding onboard environments. A trusted choice for racing yachts and high-performance cruisers.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eBalanced Performance for Modern Rigs\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe Lewmar Synchro Block Double is engineered to deliver smooth, efficient load handling in performance-focused sailing systems where precision and reliability are essential. Designed for racing yachts and fast cruising vessels alike, it offers controlled mechanical advantage with responsive, low-friction operation, supporting condifent sail trimming under load.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDouble-Sheave Configuration\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe twin-sheave layout provides increased mechanical advantage while maintaining a compact, efficient footprint. Even load distribution across both sheaves improves system efficiency and reduces handling effort, making the block well suited to control cascades, trimming systems, and other applications where progressive adjustment and consistent performance are required.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAdvanced Synchro Bearing Technology\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eAs part of Lewmar’s Synchro range, the block incorporates precision bearing technology designed to minimise friction under load. This advanced engineering delivers smoother rope movement, faster response, and reduced effort during repeated trimming and easing, particularly valuable in high-workload sailing environments.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMarine-Grade Composite Construction\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eManufactured from durable, marine-grade materials, the Synchro Block Double is built to withstand sustained loads, saltwater exposure, and frequent cycling. Robust side plates and carefully profiled sheaves ensure dimensional stability, resistance to wear and reliable long-term operation in demanding onboard conditions.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSmooth, Consistent Operation\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eOptimised sheave geometry promotes clean rope alignment and efficient load transfer, delivering predictable, low-friction performance throughout the working range. Reduced energy loss not only improves sail-handling efficiency but also helps protect running rigging from unnecessary wear over extended use.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eInstallation \u0026amp; Application\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eWell-suited to performance sailing applications including control lines, fine-tune systems, and deck-level lead arrangements, the Lewmar Synchro Block Double integrates seamlessly into modern rig and deck layouts. Its balance of power, refinement, and durability makes it a professional-grade solution backed by Lewmar’s long-standing expertise in sail-handling hardware.\u003c\/p\u003e\n\n\u003ch2 style=\"text-align: center;\"\u003e\u003cspan style=\"font-size: 2x-large;\"\u003eTechnical Description\u003c\/span\u003e\u003c\/h2\u003e\n\n\u003ctable style=\"width: 100%;\"\u003e\n\u003ctbody\u003e\n\n\u003ctr\u003e\n\u003ctd style=\"width: 50%;\"\u003e\u003cstrong\u003eProduct Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 50%;\"\u003eHardware\u003c\/td\u003e\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\u003ctd style=\"width: 50%;\"\u003e\u003cstrong\u003eHardware Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 50%;\"\u003eBlocks\u003c\/td\u003e\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\u003ctd style=\"width: 50%;\"\u003e\u003cstrong\u003eBoat Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 50%;\"\u003eSail\u003c\/td\u003e\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\u003ctd style=\"width: 50%;\"\u003e\u003cstrong\u003eBlock Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 50%;\"\u003eDouble\u003c\/td\u003e\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\u003ctd style=\"width: 50%;\"\u003e\u003cstrong\u003eSheave Diameter\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 50%;\"\u003e50mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\u003ctd style=\"width: 50%;\"\u003e\u003cstrong\u003eBoat Length\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 50%;\"\u003eup to 30ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Lewmar","offers":[{"title":"Default Title","offer_id":53592413864308,"sku":"LEW29925002BK","price":41.58,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0934\/4004\/9524\/files\/LEW29925002BK__00310.jpg.1428984928.jpg?v=1761718060","url":"https:\/\/velasailingsupply.com\/products\/lewmar-50mm-synchro-double-block","provider":"Vela Sailing Supply","version":"1.0","type":"link"}