{"product_id":"fcs-ii-ci-upright-medium-tri-quad-surfboard-fins","title":"FCS II CI Upright Medium Tri\/Quad Surfboard Fins","description":"\u003carticle class=\"product-description\"\u003e\r\n    \u003cp\u003eThe \u003cstrong\u003eFCS II CI Upright Tri\/Quad Fin Set – Medium\u003c\/strong\u003e offers next-level performance in a versatile setup designed in collaboration with Channel Islands Surfboards. Featuring an upright, pivot-ready template, this set delivers explosive drive, tight arc turns, and lightning-fast transitions—ideal for punchy, hollow waves or when you need instant speed off the takeoff.\u003c\/p\u003e\r\n\r\n    \u003cp\u003eThis medium-sized fin set includes three main fins (tri) and two quad rears, giving you the freedom to switch between a snappy thruster setup and a looser, high-speed quad configuration depending on conditions and your riding style. With flat foils across the entire set, the CI Upright is all about control and responsiveness—making it a go-to for performance shortboards, step-downs, and hybrids with relaxed rockers.\u003c\/p\u003e\r\n\r\n    \u003cp\u003eBuilt for surfers in the \u003cstrong\u003e145–175 lb (65–80 kg)\u003c\/strong\u003e range, this set delivers an ideal balance of power, control, and agility across a range of wave 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 design for tight turning radius and vertical release\u003c\/li\u003e\r\n        \u003cli\u003e\n\u003cstrong\u003eFin Setup:\u003c\/strong\u003e FCS II Tri\/Quad (5-fin) – switch between thruster and quad\u003c\/li\u003e\r\n        \u003cli\u003e\n\u003cstrong\u003ePerformance:\u003c\/strong\u003e Fast start-up speed, quick direction changes, and pocket surfing precision\u003c\/li\u003e\r\n        \u003cli\u003e\n\u003cstrong\u003eConstruction:\u003c\/strong\u003e Performance Core – lightweight and durable with flex for control\u003c\/li\u003e\r\n        \u003cli\u003e\n\u003cstrong\u003eDesigned For:\u003c\/strong\u003e CI shortboards, hybrids, and step-downs\u003c\/li\u003e\r\n    \u003c\/ul\u003e\r\n\r\n    \u003ch3\u003eMedium Size Fin Specs:\u003c\/h3\u003e\r\n    \u003cul\u003e\r\n        \u003cli\u003e\n\u003cstrong\u003eMED Side Fins:\u003c\/strong\u003e Base – 4.39\" \/ 111.4 mm | Depth – 4.59\" \/ 116.4 mm | Area – 15.04 in² \/ 9700 mm² | Sweep – 30.3° | Foil – Flat\u003c\/li\u003e\r\n        \u003cli\u003e\n\u003cstrong\u003eMED Center Fin:\u003c\/strong\u003e Base – 4.39\" \/ 111.4 mm | Depth – 4.59\" \/ 116.4 mm | Area – 15.04 in² \/ 9700 mm² | Sweep – 30.3° | Foil – Flat\u003c\/li\u003e\r\n        \u003cli\u003e\n\u003cstrong\u003eMED Quad Rears:\u003c\/strong\u003e Base – 4.04\" \/ 105.1 mm | Depth – 4.17\" \/ 108.4 mm | Area – 11.70 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 The CI Upright is part of the Reactor family, ideal for surfers who stay in the pocket, favor quick release off the top, and want precise rail-to-rail control in steep and fast waves.\u003c\/p\u003e\r\n\r\n    \u003cp\u003eThe \u003cstrong\u003eFCS II CI Upright Tri\/Quad Fin Set – Medium\u003c\/strong\u003e gives you options. Go thruster for tight control and snaps or switch to quad for down-the-line speed and loosened-up feel. However you set it up, this fin delivers on power, flow, and performance.\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 focused on premium gear for real-world surfers. Every fin set we carry is hand-selected for performance, durability, and ride feel—because we only stock what we trust. When you shop Rider Shack, you're backed by surf expertise, personalized service, and gear that elevates every session.\u003c\/p\u003e\r\n\r\n    \u003cp\u003eRide with confidence and dial in your style with the \u003cstrong\u003eFCS II CI Upright Tri\/Quad Fin Set – Medium\u003c\/strong\u003e—performance-driven and surf-tested for next-level control.\u003c\/p\u003e\r\n\u003c\/article\u003e\r\n","brand":"FCS","offers":[{"title":"Default Title","offer_id":52179545850139,"sku":"117070","price":226.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0707\/6868\/9435\/files\/117070.jpg?v=1779159662","url":"https:\/\/ridershack.com\/products\/fcs-ii-ci-upright-medium-tri-quad-surfboard-fins","provider":"Rider Shack","version":"1.0","type":"link"}