{"product_id":"flying-diamonds-x-fcs-ii-fdx1-tri-fin-hawaii","title":"Flying Diamonds FDX1 Tri Fin Set (Med-Large)","description":"\u003ch2\u003e\u003cstrong\u003eFDX1 Thruster Fin Set — 3 Fins\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eThe FDX1 Thruster is Flying Diamonds' balanced tri-fin template — designed around a neutral geometry that is not overly upright or raked. Rather than optimizing for a single wave type, it's built to serve as the performance baseline for any shortboard or mid-length in your quiver: a consistent, predictable reference point you can trust across different boards and conditions.\u003c\/p\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eNeutral, balanced template — not overly upright or raked, engineered to work as a quiver-wide performance reference point\u003c\/li\u003e\n\u003cli\u003eAirFlex construction — polyurethane foam air core with high-strength fiberglass and epoxy resin shell, delivering the lightest possible weight with optimal rebound under load\u003c\/li\u003e\n\u003cli\u003eBalanced flex pattern — lively and responsive through turns, stable and controlled when conditions demand it\u003c\/li\u003e\n\u003cli\u003eBalances speed, flow, and response — Flying Diamonds' stated performance priorities for the FDX1\u003c\/li\u003e\n\u003cli\u003eAvailable in Medium and Large; compatible with FCS II (Dual Tab 2) and Futures fin systems\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eAirFlex Construction\u003c\/h3\u003e\n\u003cp\u003eAirFlex begins with a precision-shaped polyurethane foam core — an air-core interior that removes excess weight while maintaining the fin's shape and structure. This core is wrapped in high-strength fiberglass and laminated with epoxy resin, producing a durable outer shell that holds under load.\u003c\/p\u003e\n\u003cp\u003eThe result, according to Flying Diamonds, is a balanced, predictable flex pattern with quick response and smooth feedback. The fin feels lively through turns and stable when you need it to hold — making it effective at both generating and controlling speed as a thruster.\u003c\/p\u003e\n\u003ch3\u003eFin Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eFin \/ Size\u003c\/th\u003e\n\u003cth\u003eHeight\u003c\/th\u003e\n\u003cth\u003eBase\u003c\/th\u003e\n\u003cth\u003eRake\u003c\/th\u003e\n\u003cth\u003eArea\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eCenter – Medium\u003c\/td\u003e\n\u003ctd\u003e4.36\"\u003c\/td\u003e\n\u003ctd\u003e4.47\"\u003c\/td\u003e\n\u003ctd\u003e7.21\"\u003c\/td\u003e\n\u003ctd\u003e16.85\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCenter – Large\u003c\/td\u003e\n\u003ctd\u003e4.51\"\u003c\/td\u003e\n\u003ctd\u003e4.46\"\u003c\/td\u003e\n\u003ctd\u003e7.29\"\u003c\/td\u003e\n\u003ctd\u003e17.94\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSide (Front Tri) – Medium\u003c\/td\u003e\n\u003ctd\u003e4.56\"\u003c\/td\u003e\n\u003ctd\u003e4.46\"\u003c\/td\u003e\n\u003ctd\u003e7.13\"\u003c\/td\u003e\n\u003ctd\u003e17.88\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSide (Front Tri) – Large\u003c\/td\u003e\n\u003ctd\u003e4.75\"\u003c\/td\u003e\n\u003ctd\u003e4.56\"\u003c\/td\u003e\n\u003ctd\u003e7.33\"\u003c\/td\u003e\n\u003ctd\u003e19.18\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cem\u003eAll measurements as published by Flying Diamonds of California.\u003c\/em\u003e\u003c\/p\u003e\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eFin Box System\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFCS II (Dual Tab 2) — Medium (Black Multi-Tone) and Large (Gray Multi-Tone)\u003c\/li\u003e\n\u003cli\u003eFutures — Medium and Large; confirm current stock at time of purchase\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eBoard Type\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eShortboards and mid-lengths running a standard three-fin (thruster) configuration\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eThis Fin Set Is Right for You If…\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eYou want a single thruster set that performs consistently across multiple boards — one reliable setup rather than a different fin for every board\u003c\/li\u003e\n\u003cli\u003eYou prefer a neutral, all-around template over a fin shaped for one specific wave type or condition\u003c\/li\u003e\n\u003cli\u003eYou ride FCS II or Futures boxes and want a versatile thruster option from a dedicated fin maker\u003c\/li\u003e\n\u003cli\u003eYou're establishing your quiver's performance baseline — the FDX1 is explicitly designed for this purpose\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhy the FDX1 Thruster\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eNeutral geometry covers more conditions than specialist fins built for a narrow performance window\u003c\/li\u003e\n\u003cli\u003eAirFlex construction prioritizes weight reduction without compromising structural integrity — a deliberate design decision from Flying Diamonds\u003c\/li\u003e\n\u003cli\u003eWorks across your quiver: the same set delivers a consistent feel whether you're riding your high-performance shortboard or your mid-length\u003c\/li\u003e\n\u003cli\u003eAvailable in both FCS II and Futures — covering the two most common box standards\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eAvailable at Hawaiian South Shore\u003c\/h3\u003e\n\u003cp\u003eHonolulu's premier surf boutique since 1996. Hawaii's largest Firewire retailer and exclusive Oahu dealer for the sport's most respected brands.\u003c\/p\u003e\n\u003cp\u003e📍 320 Ward Avenue #112, Honolulu, HI 96814\u003cbr\u003e📞 (808) 597-9055\u003cbr\u003e✉️ sales@hawaiiansouthshore.com\u003c\/p\u003e","brand":"FLYING DIAMONDS","offers":[{"title":"Medium - Black FCS II","offer_id":52136651161912,"sku":"148012","price":120.0,"currency_code":"USD","in_stock":true},{"title":"Medium - Black Futures","offer_id":52141568065848,"sku":"148010","price":120.0,"currency_code":"USD","in_stock":true},{"title":"Large - Grey FCS II","offer_id":52136646148408,"sku":"148013","price":120.0,"currency_code":"USD","in_stock":true},{"title":"Large - Grey Futures","offer_id":52141661192504,"sku":"148011","price":120.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0273\/2579\/2290\/files\/flying-diamonds-fdx1-tri-fin-set-med-large-shop-surf-acc-7015771.jpg?v=1775808384","url":"https:\/\/www.hawaiiansouthshore.com\/products\/flying-diamonds-x-fcs-ii-fdx1-tri-fin-hawaii","provider":"Hawaiian South Shore","version":"1.0","type":"link"}