{"product_id":"fcs-ii-ci-upright-medium-thruster-surfboard-fins","title":"FCS II CI Upright Medium Thruster Surfboard Fins","description":"\u003carticle class=\"product-description\"\u003e\r\n    \u003cp\u003eThe \u003cstrong\u003eFCS II CI Upright Tri Fin Set – Medium\u003c\/strong\u003e is a high-performance thruster fin designed in collaboration with Channel Islands Surfboards. Perfect for surfers seeking instant speed, tight turns, and maximum responsiveness, this upright fin template excels in punchy, hollow waves and delivers quick drive right from takeoff.\u003c\/p\u003e\r\n\r\n    \u003cp\u003eThis fin is especially well-suited for performance shortboards, hybrids, and step-down models with flatter rockers—boards where fast pivot and vertical surfing are key. With a full-bodied outline from base to tip, the CI Upright allows you to push hard through turns while still feeling loose and free off the top.\u003c\/p\u003e\r\n\r\n    \u003cp\u003eThis \u003cstrong\u003emedium-sized set\u003c\/strong\u003e is ideal for surfers in the \u003cstrong\u003e145–175 lb (65–80 kg)\u003c\/strong\u003e range, providing a great balance of control, drive, and agility across a variety of 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 quick rail-to-rail transitions and tight arcs\u003c\/li\u003e\r\n        \u003cli\u003e\n\u003cstrong\u003ePerformance:\u003c\/strong\u003e Fast, loose, and drivey with immediate start-up speed\u003c\/li\u003e\r\n        \u003cli\u003e\n\u003cstrong\u003eIdeal Conditions:\u003c\/strong\u003e Steep, hollow waves and punchy beach breaks\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 speed and lightweight strength\u003c\/li\u003e\r\n        \u003cli\u003e\n\u003cstrong\u003eDesigned For:\u003c\/strong\u003e Channel Islands hybrids and performance models\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\u003eFin Type:\u003c\/strong\u003e MED Side \/ MED Center\u003c\/li\u003e\r\n        \u003cli\u003e\n\u003cstrong\u003eBase:\u003c\/strong\u003e 4.39\" \/ 111.4 mm\u003c\/li\u003e\r\n        \u003cli\u003e\n\u003cstrong\u003eDepth:\u003c\/strong\u003e 4.59\" \/ 116.4 mm\u003c\/li\u003e\r\n        \u003cli\u003e\n\u003cstrong\u003eArea:\u003c\/strong\u003e 15.04 in² \/ 9700 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 is part of the Reactor family, offering maximum responsiveness, quick direction changes, and vertical surfing right in the pocket.\u003c\/p\u003e\r\n\r\n    \u003cp\u003eThe \u003cstrong\u003eFCS II CI Upright Tri Fin Set – Medium\u003c\/strong\u003e is a go-to for surfers who want fast acceleration, tight pivot, and dynamic performance in high-speed conditions.\u003c\/p\u003e\r\n\r\n    \u003ch3\u003eWhy Shop at Rider Shack?\u003c\/h3\u003e\r\n    \u003cp\u003eRider Shack is a small, family-run surf shop committed to curating the best gear for real surfers. We handpick performance equipment that we trust, use, and stand behind. When you shop with us, you’re not just getting premium fins—you’re getting personal service, expert guidance, and gear that elevates your sessions.\u003c\/p\u003e\r\n\r\n    \u003cp\u003eUpgrade your ride with the \u003cstrong\u003eFCS II CI Upright Tri Fin Set – Medium\u003c\/strong\u003e—built for power, precision, and high-performance surfing.\u003c\/p\u003e\r\n\u003c\/article\u003e\r\n","brand":"FCS","offers":[{"title":"Default Title","offer_id":52179545784603,"sku":"117068","price":146.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0707\/6868\/9435\/files\/117068.jpg?v=1779159659","url":"https:\/\/ridershack.com\/products\/fcs-ii-ci-upright-medium-thruster-surfboard-fins","provider":"Rider Shack","version":"1.0","type":"link"}