{"product_id":"fcs-ii-ci-upright-large-tri-quad-surfboard-fins","title":"FCS II CI Upright Large Tri\/Quad Surfboard Fins","description":"\u003carticle class=\"product-description\"\u003e\r\n    \u003cp\u003eThe \u003cstrong\u003eFCS II CI Upright Tri\/Quad Fin Set – Large\u003c\/strong\u003e is a high-performance 5-fin set engineered for speed, power, and vertical surfing in critical conditions. Developed in collaboration with \u003cstrong\u003eChannel Islands Surfboards\u003c\/strong\u003e, this fin delivers fast, responsive performance that shines in steep waves, punchy beach breaks, and high-energy surf sessions.\u003c\/p\u003e\r\n\r\n    \u003cp\u003eDesigned with a more upright template, this set promotes tighter, more controlled turns—ideal for surfers who want fast directional changes and the ability to stay tight in the pocket. The full base and flat foil generate immediate drive and hold, while the included \u003cstrong\u003equad rears\u003c\/strong\u003e allow you to loosen up your ride and increase down-the-line speed when conditions call for it.\u003c\/p\u003e\r\n\r\n    \u003cp\u003eThis \u003cstrong\u003elarge-sized set\u003c\/strong\u003e is optimized for surfers in the \u003cstrong\u003e175–210 lb (80–95+ kg)\u003c\/strong\u003e range, offering excellent control, drive, and projection in demanding waves.\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 design for tight arcs and vertical snaps\u003c\/li\u003e\r\n        \u003cli\u003e\n\u003cstrong\u003eFin Setup:\u003c\/strong\u003e FCS II Tri\/Quad (5-fin) – ride as a thruster or quad\u003c\/li\u003e\r\n        \u003cli\u003e\n\u003cstrong\u003ePerformance:\u003c\/strong\u003e Quick start-up speed, tight turning radius, and powerful hold\u003c\/li\u003e\r\n        \u003cli\u003e\n\u003cstrong\u003eConstruction:\u003c\/strong\u003e Performance Core – durable and lightweight with flex for precision\u003c\/li\u003e\r\n        \u003cli\u003e\n\u003cstrong\u003eBest For:\u003c\/strong\u003e Performance shortboards, hybrids, and step-downs with relaxed rocker\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\u003eLRG Side Fins:\u003c\/strong\u003e Base – 4.50\" \/ 114.2 mm | Depth – 4.70\" \/ 119.3 mm | Area – 15.79 in² \/ 10190 mm² | Sweep – 30.3° | Foil – Flat\u003c\/li\u003e\r\n        \u003cli\u003e\n\u003cstrong\u003eLRG Center Fin:\u003c\/strong\u003e Base – 4.50\" \/ 114.2 mm | Depth – 4.70\" \/ 119.3 mm | Area – 15.79 in² \/ 10190 mm² | Sweep – 30.3° | Foil – Flat\u003c\/li\u003e\r\n        \u003cli\u003e\n\u003cstrong\u003eLRG Quad Rears:\u003c\/strong\u003e Base – 4.14\" \/ 105.1 mm | Depth – 4.27\" \/ 108.4 mm | Area – 12.29 in² \/ 7929 mm² | Sweep – 33.3° | Foil – 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 Part of FCS’s Reactor family, the CI Upright Fin Set is made for surfers who favor vertical surfing, speed bursts, and in-the-pocket performance with less resistance and more freedom to release the tail when needed.\u003c\/p\u003e\r\n\r\n    \u003cp\u003eThe \u003cstrong\u003eFCS II CI Upright Tri\/Quad Fin Set – Large\u003c\/strong\u003e is a premium option for high-performance surfers who want maximum responsiveness and the ability to shift between powerful thruster lines and fast, fluid quad setups.\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 that’s committed to helping you ride better. At Rider Shack, we stock only gear we trust and test in the water ourselves—from fins to boards and beyond. When you buy from us, you’re backed by surf knowledge, personalized support, and a passion for performance-driven gear.\u003c\/p\u003e\r\n\r\n    \u003cp\u003eGet the power, control, and versatility your surfing deserves with the \u003cstrong\u003eFCS II CI Upright Tri\/Quad Fin Set – Large\u003c\/strong\u003e—designed to keep you fast, loose, and locked into your best surfing yet.\u003c\/p\u003e\r\n\u003c\/article\u003e\r\n","brand":"FCS","offers":[{"title":"Default Title","offer_id":52179550437659,"sku":"117071","price":185.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0707\/6868\/9435\/files\/117071.jpg?v=1779159664","url":"https:\/\/ridershack.com\/products\/fcs-ii-ci-upright-large-tri-quad-surfboard-fins","provider":"Rider Shack","version":"1.0","type":"link"}