{"product_id":"harken-40-mm-zircon-catamaran-mainsheet-system","title":"Harken 40 mm Zircon Catamaran Mainsheet System","description":"\u003c!-- harken-official:v2 Sku:2801 page_sha256:489492873a8dc5681ec054f8bd8d9416bef9acb56109bf1cde4d9864671179d9 --\u003e\u003ch3\u003eOverview\u003c\/h3\u003e\u003cp\u003eThis new, more compact Zircon ceramic bearing mainsheet system is a testimonial to the power of collaboration. The previous generation of GP mainsheet system had become the standard among catamaran sailors at the highest levels. But these sailors wondered if we could deliver elite performance in a lighter, tighter package. So, we shrunk everything — except what it can do. At the heart are new 40 mm Zircon sheaves it shares with its namesake Zircon blocks. These contribute 30% less ‘aero-disruption’ and clear the tiller more easily. As before, sailors may swap in any Harken Power 3 ratchet sheave to match weather conditions. They can also choose 10:1, 11:1, or 12:1 purchase and tune the cam cleat angle until it fits their sailing styles perfectly. With a new extended head post and the correct strop length, those sheaves can interlock for max mast rake.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable style=\"border-collapse:collapse;width:100%;max-width:100%;\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth style=\"text-align:left;border-bottom:1px solid #ddd;padding:8px;\"\u003eSpecification\u003c\/th\u003e\n\u003cth style=\"text-align:left;border-bottom:1px solid #ddd;padding:8px;\"\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eBreaking load (kg)\u003c\/td\u003e\n\u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e1636 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eBreaking load (lb)\u003c\/td\u003e\n\u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e3600 lb\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eMaximum line Ø (in)\u003c\/td\u003e\n\u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e5\/16 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eMaximum line Ø (mm)\u003c\/td\u003e\n\u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e8 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eMaximum working load (kg)\u003c\/td\u003e\n\u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e545 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eMaximum working load (lb)\u003c\/td\u003e\n\u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e1200 lb\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eSheave Ø (in)\u003c\/td\u003e\n\u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e1 9\/16 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eSheave Ø (mm)\u003c\/td\u003e\n\u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e40 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eWeight (g)\u003c\/td\u003e\n\u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e888 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003eWeight (oz)\u003c\/td\u003e\n\u003ctd style=\"border-bottom:1px solid #eee;padding:8px;vertical-align:top;\"\u003e31.3 oz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c!-- sr-faq v=1 vendor=harken source_sha256=5fb5bcef8a8ebaf8e9d6d8f1d2e21d280383eab18acfaf7bafd61c3e693b3a60 --\u003e\u003ch3\u003eFAQs\u003c\/h3\u003e\u003cdetails\u003e\u003csummary\u003eWhat safety guidance is provided for installation and maintenance?\u003c\/summary\u003e\u003cdiv\u003e\u003cp\u003eStrictly follow all instructions to avoid accident, damage, injury, or death.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWhat safety warning is given before installation or maintenance?\u003c\/summary\u003e\u003cdiv\u003e\u003cp\u003eStrictly follow all instructions to avoid accidents, vessel damage, injury, or death.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWhat maintenance does the mainsheet system require?\u003c\/summary\u003e\u003cdiv\u003e\u003cp\u003eClean block and attachments frequently with detergent and fresh water. Rotate sheaves and cam pawls during cleaning. Dry before reassembly.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWhat is the standard ratchet sheave grip option included?\u003c\/summary\u003e\u003cdiv\u003e\u003cp\u003eThe system comes with a 57 mm Power3 ratchet sheave with 1.5x grip installed.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eIs the system compatible with high-performance or foiling catamarans?\u003c\/summary\u003e\u003cdiv\u003e\u003cp\u003eYes, it's designed for high-performance\/foiling catamarans like the Nacra 17 and F18.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eIs a strop included with the supplied soft-attach snap shackle?\u003c\/summary\u003e\u003cdiv\u003e\u003cp\u003eNo, the strop is not included with the soft-attach snap shackle.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWhat tools are required for converting purchase ratios?\u003c\/summary\u003e\u003cdiv\u003e\u003cp\u003eA 3 mm hex key wrench is provided with the system for configuration changes.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWhat materials are the main sheaves and sideplates made from?\u003c\/summary\u003e\u003cdiv\u003e\u003cp\u003eThe 40 mm composite sheaves feature low friction ceramic bearings and the sideplates are hard-anodized aluminum.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWhich types of catamarans is this mainsheet system designed for?\u003c\/summary\u003e\u003cdiv\u003e\u003cp\u003eThis system is intended for high-performance\/foiling catamarans such as the Nacra 17 and F18.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eCan the purchaser ratio of the system be changed, and how?\u003c\/summary\u003e\u003cdiv\u003e\u003cp\u003eYes, it converts into 10:1 or 11:1 purchase using the supplied wrench and becket spacers; follow instructions for removal and replacement.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWhat tool is provided for disassembly or conversion?\u003c\/summary\u003e\u003cdiv\u003e\u003cp\u003eA 3 mm hex key wrench is provided for loosening screws when converting between purchase ratios.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eIs the ratchet sheave interchangeable, and why might you change it?\u003c\/summary\u003e\u003cdiv\u003e\u003cp\u003eYes, ratchet sheaves can be changed to customize grip depending on conditions.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eHow is the upper block attached to the boom?\u003c\/summary\u003e\u003cdiv\u003e\u003cp\u003eIt uses a soft-attach upper block and snap shackle for quick attachment with a strop.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eHow is the cam cleat angle adjusted?\u003c\/summary\u003e\u003cdiv\u003e\u003cp\u003eThe cam arm angle is infinitely adjustable to suit sailing style.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eCan Power3 ratchet sheaves with different grips be substituted?\u003c\/summary\u003e\u003cdiv\u003e\u003cp\u003eYes; two other ratchet sheaves with varying grip options can be changed out.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What safety guidance is provided for installation and maintenance?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Strictly follow all instructions to avoid accident, damage, injury, or death.\"}}, {\"@type\": \"Question\", \"name\": \"What safety warning is given before installation or maintenance?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Strictly follow all instructions to avoid accidents, vessel damage, injury, or death.\"}}, {\"@type\": \"Question\", \"name\": \"What maintenance does the mainsheet system require?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Clean block and attachments frequently with detergent and fresh water. Rotate sheaves and cam pawls during cleaning. Dry before reassembly.\"}}, {\"@type\": \"Question\", \"name\": \"What is the standard ratchet sheave grip option included?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The system comes with a 57 mm Power3 ratchet sheave with 1.5x grip installed.\"}}, {\"@type\": \"Question\", \"name\": \"Is the system compatible with high-performance or foiling catamarans?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes, it's designed for high-performance\/foiling catamarans like the Nacra 17 and F18.\"}}, {\"@type\": \"Question\", \"name\": \"Is a strop included with the supplied soft-attach snap shackle?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"No, the strop is not included with the soft-attach snap shackle.\"}}, {\"@type\": \"Question\", \"name\": \"What tools are required for converting purchase ratios?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"A 3 mm hex key wrench is provided with the system for configuration changes.\"}}, {\"@type\": \"Question\", \"name\": \"What materials are the main sheaves and sideplates made from?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The 40 mm composite sheaves feature low friction ceramic bearings and the sideplates are hard-anodized aluminum.\"}}, {\"@type\": \"Question\", \"name\": \"Which types of catamarans is this mainsheet system designed for?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"This system is intended for high-performance\/foiling catamarans such as the Nacra 17 and F18.\"}}, {\"@type\": \"Question\", \"name\": \"Can the purchaser ratio of the system be changed, and how?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes, it converts into 10:1 or 11:1 purchase using the supplied wrench and becket spacers; follow instructions for removal and replacement.\"}}, {\"@type\": \"Question\", \"name\": \"What tool is provided for disassembly or conversion?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"A 3 mm hex key wrench is provided for loosening screws when converting between purchase ratios.\"}}, {\"@type\": \"Question\", \"name\": \"Is the ratchet sheave interchangeable, and why might you change it?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes, ratchet sheaves can be changed to customize grip depending on conditions.\"}}, {\"@type\": \"Question\", \"name\": \"How is the upper block attached to the boom?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"It uses a soft-attach upper block and snap shackle for quick attachment with a strop.\"}}, {\"@type\": \"Question\", \"name\": \"How is the cam cleat angle adjusted?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The cam arm angle is infinitely adjustable to suit sailing style.\"}}, {\"@type\": \"Question\", \"name\": \"Can Power3 ratchet sheaves with different grips be substituted?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes; two other ratchet sheaves with varying grip options can be changed out.\"}}]}\u003c\/script\u003e\u003c!-- \/sr-faq --\u003e\u003c!-- \/harken-official --\u003e","brand":"Harken","offers":[{"title":"Default Title","offer_id":53195969233233,"sku":"2801","price":2453.94,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0955\/4434\/4913\/files\/5ba7175e-418a-4738-ae0f-1e9bb36c67ff.jpg?v=1772622810","url":"https:\/\/www.sailrace.com\/hi\/products\/harken-40-mm-zircon-catamaran-mainsheet-system","provider":"SailRACE","version":"1.0","type":"link"}