{"product_id":"fcs-ii-ci-upright-large-thruster-surfboard-fins","title":"FCS II CI Upright Large Thruster Surfboard Fins","description":"\u003carticle class=\"product-description\"\u003e\r\n    \u003cp\u003eThe \u003cstrong\u003eFCS II CI Upright Tri Fin Set – Large\u003c\/strong\u003e is a high-performance fin setup designed in collaboration with Channel Islands Surfboards. This fin excels in punchy, steep waves and is perfect for surfers who want rapid start-up speed, tight arc turns, and powerful performance in the pocket. With an upright template and a full outline, the CI Upright allows for aggressive direction changes while maintaining flow and drive.\u003c\/p\u003e\r\n\r\n    \u003cp\u003eIdeal for performance shortboards, hybrids, and step-downs with relaxed rocker profiles, this fin has quickly become a go-to for CI team riders who want less drag, quicker turns, and increased responsiveness—especially in critical sections of the wave.\u003c\/p\u003e\r\n\r\n    \u003cp\u003eThis \u003cstrong\u003elarge-sized set\u003c\/strong\u003e is best suited for surfers in the \u003cstrong\u003e175–210 lb (80–95+ kg)\u003c\/strong\u003e range, offering enhanced control, power, and hold in bigger or more demanding conditions.\u003c\/p\u003e\r\n\r\n    \u003ch2\u003eKey Features:\u003c\/h2\u003e\r\n    \u003cul\u003e\r\n        \u003cli\u003e\n\u003cstrong\u003eTemplate:\u003c\/strong\u003e Upright shape for fast transitions and tight turning radius\u003c\/li\u003e\r\n        \u003cli\u003e\n\u003cstrong\u003ePerformance:\u003c\/strong\u003e Instant drive and quick release off the top\u003c\/li\u003e\r\n        \u003cli\u003e\n\u003cstrong\u003eIdeal Conditions:\u003c\/strong\u003e Steep, hollow waves and beach breaks where tight control is key\u003c\/li\u003e\r\n        \u003cli\u003e\n\u003cstrong\u003eFin Setup:\u003c\/strong\u003e FCS II Tri Fin – no screws required\u003c\/li\u003e\r\n        \u003cli\u003e\n\u003cstrong\u003eConstruction:\u003c\/strong\u003e Performance Core for lightweight strength and speed\u003c\/li\u003e\r\n        \u003cli\u003e\n\u003cstrong\u003eDesigned For:\u003c\/strong\u003e CI hybrid and high-performance models\u003c\/li\u003e\r\n    \u003c\/ul\u003e\r\n\r\n    \u003ch3\u003eLarge Size Fin Specs:\u003c\/h3\u003e\r\n    \u003cul\u003e\r\n        \u003cli\u003e\n\u003cstrong\u003eFin Type:\u003c\/strong\u003e LRG Side \/ LRG Center\u003c\/li\u003e\r\n        \u003cli\u003e\n\u003cstrong\u003eBase:\u003c\/strong\u003e 4.50\" \/ 114.2 mm\u003c\/li\u003e\r\n        \u003cli\u003e\n\u003cstrong\u003eDepth:\u003c\/strong\u003e 4.70\" \/ 119.3 mm\u003c\/li\u003e\r\n        \u003cli\u003e\n\u003cstrong\u003eArea:\u003c\/strong\u003e 15.79 in² \/ 10190 mm²\u003c\/li\u003e\r\n        \u003cli\u003e\n\u003cstrong\u003eSweep:\u003c\/strong\u003e 30.3°\u003c\/li\u003e\r\n        \u003cli\u003e\n\u003cstrong\u003eFoil:\u003c\/strong\u003e Flat\u003c\/li\u003e\r\n    \u003c\/ul\u003e\r\n\r\n    \u003ch3\u003eFin Family – Reactor:\u003c\/h3\u003e\r\n    \u003cp\u003e\u003cstrong\u003eSpeed. Snaps. Tight Turns.\u003c\/strong\u003e The CI Upright fits into the Reactor family, offering explosive performance, quick vertical maneuvers, and maximum reactivity in tight pockets and steeper faces.\u003c\/p\u003e\r\n\r\n    \u003cp\u003eThe \u003cstrong\u003eFCS II CI Upright Tri Fin Set – Large\u003c\/strong\u003e is built for surfers who demand speed, control, and precision under pressure. Whether you're threading barrels or hitting vertical lips, this fin delivers the sharp response and drive you need to stay in control.\u003c\/p\u003e\r\n\r\n    \u003ch3\u003eWhy Shop at Rider Shack?\u003c\/h3\u003e\r\n    \u003cp\u003eWe’re a small, family-run surf shop dedicated to outfitting real surfers with quality gear. Every product we carry—like the CI Upright—is chosen for its performance, durability, and ability to elevate your session. When you shop Rider Shack, you're supporting a shop that lives and breathes the surf lifestyle with curated gear you can trust.\u003c\/p\u003e\r\n\r\n    \u003cp\u003eLevel up your board's performance with the \u003cstrong\u003eFCS II CI Upright Tri Fin Set – Large\u003c\/strong\u003e—crafted for power surfers chasing tight turns and responsive control.\u003c\/p\u003e\r\n\u003c\/article\u003e\r\n","brand":"FCS","offers":[{"title":"Default Title","offer_id":52179545817371,"sku":"117069","price":146.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0707\/6868\/9435\/files\/117069.jpg?v=1779159660","url":"https:\/\/ridershack.com\/products\/fcs-ii-ci-upright-large-thruster-surfboard-fins","provider":"Rider Shack","version":"1.0","type":"link"}