{"title":"SUP Fin Compatibility – US-Box, Slide-In \u0026 Smartlock","description":"\u003cp data-start=\"725\" data-end=\"1019\"\u003eChoosing the right SUP fin starts with knowing your \u003cstrong data-start=\"822\" data-end=\"841\"\u003emounting system\u003c\/strong\u003e. The three most common types are \u003cstrong data-start=\"875\" data-end=\"885\"\u003eUS-Box\u003c\/strong\u003e, \u003cstrong data-start=\"887\" data-end=\"912\"\u003eSlide-In \/ Quick-Lock\u003c\/strong\u003e, and \u003cstrong data-start=\"918\" data-end=\"931\"\u003eSmartlock\u003c\/strong\u003e. Each system changes how your board tracks, turns and glides — and which fins will fit.\u003c\/p\u003e\n\u003cp data-start=\"1021\" data-end=\"1391\"\u003e\u003cstrong data-start=\"1021\" data-end=\"1031\"\u003eUS-Box\u003c\/strong\u003e is the long single track you adjust with a screw or clip. It’s derived from longboard surfing and widely used on touring, all-round and racing SUPs. The big advantage is \u003cstrong data-start=\"1202\" data-end=\"1236\"\u003euniversality and adjustability\u003c\/strong\u003e: you can slide the fin forward (more maneuverability) or back (more tracking) and choose from many aftermarket fins.\u003c\/p\u003e\n\u003cp data-start=\"1393\" data-end=\"1742\"\u003e\u003cstrong data-start=\"1393\" data-end=\"1418\"\u003eSlide-In \/ Quick-Lock\u003c\/strong\u003e is common on many inflatable SUPs. The fin \u003cstrong data-start=\"1462\" data-end=\"1519\"\u003eslides into a plastic channel and locks without tools\u003c\/strong\u003e. It’s fast and beginner-friendly, but offers less fore-aft adjustment and is usually tied to brand-specific shapes. Aqua Marina’s center fins are a classic example of a Slide-In mount.\u003c\/p\u003e\n\u003cp data-start=\"1744\" data-end=\"2059\"\u003e\u003cstrong data-start=\"1744\" data-end=\"1757\"\u003eSmartlock\u003c\/strong\u003e is a proprietary \u003cstrong data-start=\"1775\" data-end=\"1793\"\u003epush-click fin\u003c\/strong\u003e used by brands like \u003cstrong data-start=\"1814\" data-end=\"1825\"\u003eBluefin\u003c\/strong\u003e. It’s extremely quick to mount, but compatibility is limited to boards built for Smartlock. If you have a Bluefin board from the Cruise\/Aura\/Voyage\/Sprint ranges, you’re likely using this system.\u003c\/p\u003e\n\u003cp data-start=\"2061\" data-end=\"2362\"\u003eUse the comparison table below to match your board to the right fin and choose between \u003cstrong data-start=\"2148\" data-end=\"2165\"\u003etouring glide\u003c\/strong\u003e (deeper, longer fins) and \u003cstrong data-start=\"2192\" data-end=\"2216\"\u003eshallow-water safety\u003c\/strong\u003e (shorter river fins). All fins in this collection are \u003cstrong data-start=\"2271\" data-end=\"2314\"\u003eMade in Germany from recycled materials\u003c\/strong\u003e and tested on rivers, lakes and coastal routes. \u003c\/p\u003e\n\u003cp data-start=\"2364\" data-end=\"2592\"\u003e\u003cstrong data-start=\"2364\" data-end=\"2372\"\u003eTip:\u003c\/strong\u003e If your box has a \u003cstrong data-start=\"2391\" data-end=\"2413\"\u003elong track + screw\u003c\/strong\u003e → it’s US-Box. If it’s a \u003cstrong data-start=\"2439\" data-end=\"2466\"\u003eclip-in plastic channel\u003c\/strong\u003e → Slide-In. If it’s a \u003cstrong data-start=\"2489\" data-end=\"2517\"\u003ebrand-specific click tab\u003c\/strong\u003e on Bluefin (or similar) → Smartlock.\u003c\/p\u003e","products":[{"product_id":"sup-quick-lock-single-fin","title":"SUP Classic Fin - Quick-Lock","description":"\u003cp data-start=\"391\" data-end=\"669\"\u003eThe \u003cstrong data-start=\"395\" data-end=\"427\"\u003eClassic SUP Fin – Quick-Lock\u003c\/strong\u003e is a reliable \u003cstrong data-start=\"442\" data-end=\"474\"\u003epaddle board replacement fin\u003c\/strong\u003e designed for easy installation, stable tracking, and all-round paddling performance. With the \u003cstrong data-start=\"569\" data-end=\"600\"\u003etool-free Quick-Lock system\u003c\/strong\u003e, the fin clicks into place in seconds — no screws or tools required.\u003c\/p\u003e\n\u003cp data-start=\"671\" data-end=\"953\"\u003eThis \u003cstrong data-start=\"676\" data-end=\"707\"\u003eQuick-Lock paddle board fin\u003c\/strong\u003e improves straight-line tracking and stability, helping your board glide efficiently across lakes, rivers, and coastal waters. Whether you lost your original fin or want a dependable spare, this fin keeps your paddle board performing at its best.\u003c\/p\u003e\n\u003cp data-start=\"955\" data-end=\"1161\"\u003eMade from \u003cstrong data-start=\"965\" data-end=\"1008\"\u003efiberglass-reinforced recycled material\u003c\/strong\u003e, it offers durability, stiffness, and long-lasting performance while supporting more sustainable watersports gear.\u003c\/p\u003e\n\u003ch2 data-start=\"1168\" data-end=\"1195\"\u003eCompatible Paddle Boards\u003c\/h2\u003e\n\u003cp data-start=\"1197\" data-end=\"1311\"\u003eThis \u003cstrong data-start=\"1202\" data-end=\"1237\"\u003eQuick-Lock \/ Smart-Lock SUP fin\u003c\/strong\u003e fits many inflatable paddle boards using \u003cstrong data-start=\"1279\" data-end=\"1310\"\u003etool-free click fin systems\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp data-start=\"1313\" data-end=\"1356\"\u003eCompatible with boards from brands such as:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli data-start=\"1360\" data-end=\"1401\"\u003e\u003cstrong data-start=\"1360\" data-end=\"1401\"\u003e\u003cspan class=\"hover:entity-accent entity-underline inline cursor-pointer align-baseline\"\u003e\u003cspan class=\"whitespace-normal\"\u003eBluefin SUP\u003c\/span\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli data-start=\"1404\" data-end=\"1445\"\u003e\u003cstrong data-start=\"1404\" data-end=\"1445\"\u003e\u003cspan class=\"hover:entity-accent entity-underline inline cursor-pointer align-baseline\"\u003e\u003cspan class=\"whitespace-normal\"\u003eThurso Surf\u003c\/span\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli data-start=\"1448\" data-end=\"1489\"\u003e\u003cstrong data-start=\"1448\" data-end=\"1489\"\u003e\u003cspan class=\"hover:entity-accent entity-underline inline cursor-pointer align-baseline\"\u003e\u003cspan class=\"whitespace-normal\"\u003eJobe\u003c\/span\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli data-start=\"1492\" data-end=\"1533\"\u003e\u003cstrong data-start=\"1492\" data-end=\"1533\"\u003e\u003cspan class=\"hover:entity-accent entity-underline inline cursor-pointer align-baseline\"\u003e\u003cspan class=\"whitespace-normal\"\u003eiRocker\u003c\/span\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1682\" data-end=\"1805\"\u003eIf your board uses a \u003cstrong data-start=\"1703\" data-end=\"1750\"\u003eQuick-Lock, Smart-Lock, or click-fin system\u003c\/strong\u003e, this fin works as a reliable \u003cstrong data-start=\"1781\" data-end=\"1804\"\u003eSUP fin replacement\u003c\/strong\u003e.\u003c\/p\u003e\n\u003ch2 data-start=\"2211\" data-end=\"2225\"\u003ePerfect For\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli data-start=\"2229\" data-end=\"2279\"\u003eReplacing a lost \u003cstrong data-start=\"2246\" data-end=\"2277\"\u003eQuick-Lock paddle board fin\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2282\" data-end=\"2350\"\u003eInflatable paddle boards using \u003cstrong data-start=\"2313\" data-end=\"2348\"\u003eSmart-Lock or click fin systems\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2353\" data-end=\"2402\"\u003eAll-round \u003cstrong data-start=\"2363\" data-end=\"2400\"\u003eSUP paddling and beginner touring\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2405\" data-end=\"2444\"\u003ePaddle board families and rental boards\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Eisbach Riders","offers":[{"title":"Default Title","offer_id":54276510253404,"sku":"ER-SFQL-C9-BK","price":29.95,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0897\/3467\/6828\/files\/sup-fin-classic-quick-lock-single-fin-eisbach-riders-1472070.png?v=1763231531"},{"product_id":"sup-us-box-single-fin","title":"SUP Classic Fin - US-Box","description":"\u003cp data-start=\"328\" data-end=\"657\"\u003eThe \u003cstrong data-start=\"332\" data-end=\"360\"\u003eClassic SUP Fin – US Box\u003c\/strong\u003e is a reliable \u003cstrong data-start=\"375\" data-end=\"407\"\u003epaddle board replacement fin\u003c\/strong\u003e designed for stability, smooth tracking, and easy installation. Whether you lost your original fin or want a dependable spare, this \u003cstrong data-start=\"540\" data-end=\"558\"\u003eUS-Box SUP fin\u003c\/strong\u003e keeps your paddle board moving straight and efficiently on lakes, rivers, and calm coastal waters.\u003c\/p\u003e\n\u003cp data-start=\"328\" data-end=\"657\"\u003eThis classic \u003cstrong data-start=\"828\" data-end=\"846\"\u003eSUP center fin\u003c\/strong\u003e provides the balanced glide and control paddlers need for everyday touring and all-round paddling.\u003c\/p\u003e\n\u003cp data-start=\"947\" data-end=\"1113\"\u003eMade from durable \u003cstrong data-start=\"965\" data-end=\"1008\"\u003efiberglass-reinforced recycled material\u003c\/strong\u003e, the fin delivers long-lasting performance while supporting a more sustainable approach to water sports.\u003c\/p\u003e\n\u003ch2 data-start=\"1120\" data-end=\"1153\"\u003eUniversal US-Box Compatibility\u003c\/h2\u003e\n\u003cp data-start=\"1155\" data-end=\"1361\"\u003eThis \u003cstrong data-start=\"1160\" data-end=\"1192\"\u003epaddle board fin replacement\u003c\/strong\u003e fits most boards with the \u003cstrong data-start=\"1219\" data-end=\"1249\"\u003estandard US-Box fin system\u003c\/strong\u003e, one of the most widely used center fin systems for SUP and surfboards. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"1363\" data-end=\"1423\"\u003eCompatible with many paddle boards including brands such as:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli data-start=\"1427\" data-end=\"1442\"\u003eRed Paddle Co\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1459\" data-end=\"1468\"\u003eFanatic\u003c\/li\u003e\n\u003cli data-start=\"1471\" data-end=\"1485\"\u003eJP Australia\u003c\/li\u003e\n\u003cli data-start=\"1471\" data-end=\"1485\"\u003eStarboard\u003c\/li\u003e\n\u003cli data-start=\"1471\" data-end=\"1485\"\u003emany inflatable and hard paddle boards with a \u003cstrong data-start=\"1534\" data-end=\"1548\"\u003eUS fin box\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1550\" data-end=\"1626\"\u003eIf your board uses a \u003cstrong data-start=\"1571\" data-end=\"1606\"\u003eUS-Box fin with screw and plate\u003c\/strong\u003e, this fin will fit.\u003c\/p\u003e\n\u003ch2 data-start=\"1990\" data-end=\"2004\"\u003ePerfect For\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli data-start=\"2008\" data-end=\"2047\"\u003eReplacing a lost \u003cstrong data-start=\"2025\" data-end=\"2045\"\u003epaddle board fin\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2050\" data-end=\"2090\"\u003eAll-round \u003cstrong data-start=\"2060\" data-end=\"2088\"\u003eSUP paddling and touring\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2093\" data-end=\"2149\"\u003eInflatable and hard boards with \u003cstrong data-start=\"2125\" data-end=\"2147\"\u003eUS-Box fin systems\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2152\" data-end=\"2214\"\u003eBeginners looking for a stable and reliable \u003cstrong data-start=\"2196\" data-end=\"2214\"\u003eSUP center fin\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Eisbach Riders","offers":[{"title":"Default Title","offer_id":54276510712156,"sku":"ER-SFUS-C9-BK","price":29.95,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0897\/3467\/6828\/files\/sup-fin-classic-us-box-single-fin-eisbach-riders-9749350.png?v=1763231537"},{"product_id":"sup-us-box-single-fin-touring","title":"SUP Touring Fin - US-Box","description":"\u003cp data-start=\"533\" data-end=\"698\"\u003eDesigned for paddlers who want \u003cstrong data-start=\"564\" data-end=\"599\"\u003emaximum tracking and efficiency\u003c\/strong\u003e, the \u003cstrong data-start=\"605\" data-end=\"633\"\u003eSUP Touring Fin – US Box\u003c\/strong\u003e helps your board glide straighter and farther with every stroke.\u003c\/p\u003e\n\u003cp data-start=\"700\" data-end=\"1009\"\u003eCompared to shorter all-round fins, the larger touring fin profile improves \u003cstrong data-start=\"776\" data-end=\"802\"\u003estraight-line tracking\u003c\/strong\u003e, allowing you to take \u003cstrong data-start=\"825\" data-end=\"891\"\u003esignificantly more paddle strokes on one side before switching\u003c\/strong\u003e. This reduces zig-zag movement and makes long-distance paddling more efficient. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"1011\" data-end=\"1130\"\u003eThe result: smoother glide, fewer paddle side changes, and better control on lakes, rivers, and coastal touring routes.\u003c\/p\u003e\n\u003ch2 data-start=\"1048\" data-end=\"1075\"\u003eCompatible Paddle Boards\u003c\/h2\u003e\n\u003cp data-start=\"1077\" data-end=\"1241\"\u003eThis\u003cspan\u003e \u003c\/span\u003e\u003cstrong data-start=\"1082\" data-end=\"1100\"\u003eUS-Box SUP fin\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003efits most paddle boards with the standard\u003cspan\u003e \u003c\/span\u003e\u003cstrong data-start=\"1143\" data-end=\"1164\"\u003eUS fin box system\u003c\/strong\u003e, the most common center fin setup used on inflatable and hard paddle boards.\u003c\/p\u003e\n\u003cp data-start=\"1243\" data-end=\"1291\"\u003eCompatible with many boards from brands such as:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli data-start=\"1295\" data-end=\"1334\"\u003e\u003cspan class=\"hover:entity-accent entity-underline inline cursor-pointer align-baseline\"\u003e\u003cspan class=\"whitespace-normal\"\u003eRed Paddle Co\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli data-start=\"1379\" data-end=\"1418\"\u003e\u003cspan class=\"hover:entity-accent entity-underline inline cursor-pointer align-baseline\"\u003e\u003cspan class=\"whitespace-normal\"\u003eFanatic\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli data-start=\"1421\" data-end=\"1460\"\u003e\u003cspan class=\"hover:entity-accent entity-underline inline cursor-pointer align-baseline\"\u003e\u003cspan class=\"whitespace-normal\"\u003eJP Australia\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan class=\"hover:entity-accent entity-underline inline cursor-pointer align-baseline\"\u003e\u003cspan class=\"whitespace-normal\"\u003emost boards from Starboard\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1462\" data-end=\"1580\"\u003eIf your board uses a\u003cspan\u003e \u003c\/span\u003e\u003cstrong data-start=\"1483\" data-end=\"1525\"\u003eUS-Box center fin with screw and plate\u003c\/strong\u003e, this fin works as a reliable\u003cspan\u003e \u003c\/span\u003e\u003cstrong data-start=\"1556\" data-end=\"1579\"\u003eSUP fin replacement.\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch2 data-start=\"1508\" data-end=\"1522\"\u003ePerfect For\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli data-start=\"1526\" data-end=\"1553\"\u003eLong-distance SUP touring\u003c\/li\u003e\n\u003cli data-start=\"1556\" data-end=\"1585\"\u003eLake paddling and flatwater\u003c\/li\u003e\n\u003cli data-start=\"1588\" data-end=\"1620\"\u003ePaddle board training sessions\u003c\/li\u003e\n\u003cli data-start=\"1623\" data-end=\"1667\"\u003eReplacing a lost \u003cstrong data-start=\"1640\" data-end=\"1667\"\u003eUS-Box paddle board fin\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Eisbach Riders","offers":[{"title":"Default Title","offer_id":54276510384476,"sku":"ER-SFUS-T94-BK","price":45.95,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0897\/3467\/6828\/files\/sup-fin-touring-us-box-single-fin-eisbach-riders-1579240.png?v=1763231532"},{"product_id":"sup-quick-lock-single-fin-touring","title":"SUP Touring Fin - Quick-Lock","description":"\u003cp data-end=\"698\" data-start=\"533\"\u003eDesigned for paddlers who want \u003cstrong data-end=\"599\" data-start=\"564\"\u003emaximum tracking and efficiency\u003c\/strong\u003e, the \u003cstrong data-end=\"633\" data-start=\"605\"\u003eSUP Touring Fin – Quick-Lock\u003c\/strong\u003e helps your board glide straighter and farther with every stroke.\u003c\/p\u003e\n\u003cp data-end=\"1009\" data-start=\"700\"\u003eCompared to shorter all-round fins, the larger touring fin profile improves \u003cstrong data-end=\"802\" data-start=\"776\"\u003estraight-line tracking\u003c\/strong\u003e, allowing you to take \u003cstrong data-end=\"891\" data-start=\"825\"\u003esignificantly more paddle strokes on one side before switching\u003c\/strong\u003e. This reduces zig-zag movement and makes long-distance paddling more efficient. \u003cspan data-state=\"closed\" class=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-end=\"1130\" data-start=\"1011\"\u003eThe result: smoother glide, fewer paddle side changes, and better control on lakes, rivers, and coastal touring routes.\u003c\/p\u003e\n\u003ch2 data-start=\"1174\" data-end=\"1201\"\u003eCompatible Paddle Boards\u003c\/h2\u003e\n\u003cp data-start=\"1203\" data-end=\"1357\"\u003eThis\u003cspan\u003e \u003c\/span\u003e\u003cstrong data-start=\"1208\" data-end=\"1243\"\u003eQuick-Lock \/ Smart Lock SUP fin\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eis compatible with many inflatable paddle boards that use\u003cspan\u003e \u003c\/span\u003e\u003cstrong data-start=\"1302\" data-end=\"1333\"\u003etool-free click fin systems\u003c\/strong\u003e, including boards from:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli data-start=\"1203\" data-end=\"1357\"\u003e\u003cstrong data-start=\"1361\" data-end=\"1402\"\u003e\u003cspan class=\"hover:entity-accent entity-underline inline cursor-pointer align-baseline\"\u003e\u003cspan class=\"whitespace-normal\"\u003eBluefin SUP\u003c\/span\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli data-start=\"1203\" data-end=\"1357\"\u003e\u003cstrong data-start=\"1405\" data-end=\"1446\"\u003e\u003cspan class=\"hover:entity-accent entity-underline inline cursor-pointer align-baseline\"\u003e\u003cspan class=\"whitespace-normal\"\u003eThurso Surf\u003c\/span\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli data-start=\"1449\" data-end=\"1490\"\u003e\u003cstrong data-start=\"1449\" data-end=\"1490\"\u003e\u003cspan class=\"hover:entity-accent entity-underline inline cursor-pointer align-baseline\"\u003e\u003cspan class=\"whitespace-normal\"\u003eJobe\u003c\/span\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli data-start=\"1493\" data-end=\"1534\"\u003e\u003cstrong data-start=\"1493\" data-end=\"1534\"\u003e\u003cspan class=\"hover:entity-accent entity-underline inline cursor-pointer align-baseline\"\u003e\u003cspan class=\"whitespace-normal\"\u003eiRocker\u003c\/span\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 data-start=\"1508\" data-end=\"1522\"\u003ePerfect For\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli data-start=\"1526\" data-end=\"1553\"\u003eLong-distance SUP touring\u003c\/li\u003e\n\u003cli data-start=\"1556\" data-end=\"1585\"\u003eLake paddling and flatwater\u003c\/li\u003e\n\u003cli data-start=\"1588\" data-end=\"1620\"\u003ePaddle board training sessions\u003c\/li\u003e\n\u003cli data-start=\"1623\" data-end=\"1667\"\u003eReplacing a lost \u003cstrong data-start=\"1640\" data-end=\"1667\"\u003eUS-Box paddle board fin\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Eisbach Riders","offers":[{"title":"Default Title","offer_id":54276512285020,"sku":"ER-SFQL-TN-BK","price":45.95,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0897\/3467\/6828\/files\/sup-fin-touring-quick-lock-single-fin-eisbach-riders-6911572.png?v=1763231540"},{"product_id":"flexible-river-sup-fin-us-box","title":"Flexible River SUP Fin – US Box","description":"\u003cp data-start=\"329\" data-end=\"651\"\u003eUpgrade your paddle board with a \u003cstrong data-start=\"362\" data-end=\"407\"\u003eflexible river SUP fin for US-Box systems\u003c\/strong\u003e, designed for shallow water paddling, river touring, and long-distance paddle boarding. This \u003cstrong data-start=\"501\" data-end=\"528\"\u003eUS-Box paddle board fin\u003c\/strong\u003e delivers excellent tracking, stability, and control while remaining flexible enough to handle rocks and shallow riverbeds.\u003c\/p\u003e\n\u003cp data-start=\"653\" data-end=\"830\"\u003eThe flexible construction helps absorb impacts, making it the ideal \u003cstrong data-start=\"721\" data-end=\"753\"\u003epaddle board replacement fin\u003c\/strong\u003e for paddlers exploring rivers, alpine waterways, and low-depth environments.\u003c\/p\u003e\n\u003cp data-start=\"832\" data-end=\"1041\"\u003eThis durable \u003cstrong data-start=\"900\" data-end=\"918\"\u003eSUP center fin\u003c\/strong\u003e combines sustainability with reliable performance — whether you're paddling calm lakes, flowing rivers, or coastal waters.\u003c\/p\u003e\n\u003ch2 data-start=\"1048\" data-end=\"1075\"\u003eCompatible Paddle Boards\u003c\/h2\u003e\n\u003cp data-start=\"1077\" data-end=\"1241\"\u003eThis \u003cstrong data-start=\"1082\" data-end=\"1100\"\u003eUS-Box SUP fin\u003c\/strong\u003e fits most paddle boards with the standard \u003cstrong data-start=\"1143\" data-end=\"1164\"\u003eUS fin box system\u003c\/strong\u003e, the most common center fin setup used on inflatable and hard paddle boards.\u003c\/p\u003e\n\u003cp data-start=\"1243\" data-end=\"1291\"\u003eCompatible with many boards from brands such as:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli data-start=\"1295\" data-end=\"1334\"\u003e\u003cspan class=\"hover:entity-accent entity-underline inline cursor-pointer align-baseline\"\u003e\u003cspan class=\"whitespace-normal\"\u003eRed Paddle Co\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli data-start=\"1379\" data-end=\"1418\"\u003e\u003cspan class=\"hover:entity-accent entity-underline inline cursor-pointer align-baseline\"\u003e\u003cspan class=\"whitespace-normal\"\u003eFanatic\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli data-start=\"1421\" data-end=\"1460\"\u003e\u003cspan class=\"hover:entity-accent entity-underline inline cursor-pointer align-baseline\"\u003e\u003cspan class=\"whitespace-normal\"\u003eJP Australia\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan class=\"hover:entity-accent entity-underline inline cursor-pointer align-baseline\"\u003e\u003cspan class=\"whitespace-normal\"\u003emost boards from Starboard\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1462\" data-end=\"1580\"\u003eIf your board uses a \u003cstrong data-start=\"1483\" data-end=\"1525\"\u003eUS-Box center fin with screw and plate\u003c\/strong\u003e, this fin works as a reliable \u003cstrong data-start=\"1556\" data-end=\"1579\"\u003eSUP fin replacement.\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch2 data-start=\"1994\" data-end=\"2008\"\u003ePerfect For\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli data-start=\"2012\" data-end=\"2050\"\u003eRiver paddling and shallow water SUP\u003c\/li\u003e\n\u003cli data-start=\"2053\" data-end=\"2102\"\u003ePaddle board touring and long-distance paddling\u003c\/li\u003e\n\u003cli data-start=\"2105\" data-end=\"2152\"\u003eReplacing lost or damaged \u003cstrong data-start=\"2131\" data-end=\"2150\"\u003eUS-Box SUP fins\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2155\" data-end=\"2211\"\u003eInflatable and hard boards using a \u003cstrong data-start=\"2190\" data-end=\"2211\"\u003eUS fin box system\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Eisbach Riders","offers":[{"title":"Default Title","offer_id":54276512088412,"sku":"ER-SFUS-R47-BK","price":49.95,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0897\/3467\/6828\/files\/sup-fin-river-touring-flexible-us-box-single-fin-eisbach-riders-2070833.png?v=1763231531"},{"product_id":"flexible-river-sup-fin-quick-lock","title":"Flexible River SUP Fin – Quick-Lock","description":"\u003cp data-start=\"477\" data-end=\"777\"\u003eUpgrade your board with a \u003cstrong data-start=\"503\" data-end=\"611\"\u003eflexible river SUP fin designed for shallow water paddling, river touring, and all-round paddle boarding\u003c\/strong\u003e. This \u003cstrong data-start=\"618\" data-end=\"649\"\u003eQuick-Lock paddle board fin\u003c\/strong\u003e installs in seconds without tools and provides excellent stability, tracking, and control in rivers, lakes, and coastal waters.\u003c\/p\u003e\n\u003cp data-start=\"779\" data-end=\"972\"\u003eThe flexible construction helps absorb impacts with rocks and shallow riverbeds, making it the ideal \u003cstrong data-start=\"880\" data-end=\"909\"\u003eriver SUP fin replacement\u003c\/strong\u003e for paddlers exploring moving water or low-depth environments.\u003c\/p\u003e\n\u003cp data-start=\"974\" data-end=\"1167\"\u003eEngineered with durable\u003cstrong data-start=\"998\" data-end=\"1041\"\u003e \u003c\/strong\u003ematerial, this \u003cstrong data-start=\"1048\" data-end=\"1080\"\u003epaddle board replacement fin\u003c\/strong\u003e combines sustainability with reliable performance — from calm lakes to flowing rivers.\u003c\/p\u003e\n\u003ch2 data-start=\"1174\" data-end=\"1201\"\u003eCompatible Paddle Boards\u003c\/h2\u003e\n\u003cp data-start=\"1203\" data-end=\"1357\"\u003eThis \u003cstrong data-start=\"1208\" data-end=\"1243\"\u003eQuick-Lock \/ Smart Lock SUP fin\u003c\/strong\u003e is compatible with many inflatable paddle boards that use \u003cstrong data-start=\"1302\" data-end=\"1333\"\u003etool-free click fin systems\u003c\/strong\u003e, including boards from:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli data-start=\"1203\" data-end=\"1357\"\u003e\u003cstrong data-start=\"1361\" data-end=\"1402\"\u003e\u003cspan class=\"hover:entity-accent entity-underline inline cursor-pointer align-baseline\"\u003e\u003cspan class=\"whitespace-normal\"\u003eBluefin SUP\u003c\/span\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli data-start=\"1203\" data-end=\"1357\"\u003e\u003cstrong data-start=\"1405\" data-end=\"1446\"\u003e\u003cspan class=\"hover:entity-accent entity-underline inline cursor-pointer align-baseline\"\u003e\u003cspan class=\"whitespace-normal\"\u003eThurso Surf\u003c\/span\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli data-start=\"1449\" data-end=\"1490\"\u003e\u003cstrong data-start=\"1449\" data-end=\"1490\"\u003e\u003cspan class=\"hover:entity-accent entity-underline inline cursor-pointer align-baseline\"\u003e\u003cspan class=\"whitespace-normal\"\u003eJobe\u003c\/span\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli data-start=\"1493\" data-end=\"1534\"\u003e\u003cstrong data-start=\"1493\" data-end=\"1534\"\u003e\u003cspan class=\"hover:entity-accent entity-underline inline cursor-pointer align-baseline\"\u003e\u003cspan class=\"whitespace-normal\"\u003eiRocker\u003c\/span\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 data-start=\"2108\" data-end=\"2122\"\u003ePerfect For\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli data-start=\"2126\" data-end=\"2160\"\u003eRiver paddling and shallow water\u003c\/li\u003e\n\u003cli data-start=\"2163\" data-end=\"2212\"\u003ePaddle board touring and long-distance paddling\u003c\/li\u003e\n\u003cli data-start=\"2215\" data-end=\"2275\"\u003eReplacing lost or damaged \u003cstrong data-start=\"2241\" data-end=\"2273\"\u003eQuick-Lock paddle board fins\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2278\" data-end=\"2341\"\u003eInflatable SUP boards using \u003cstrong data-start=\"2306\" data-end=\"2341\"\u003eSmart Lock or click fin systems\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Eisbach Riders","offers":[{"title":"Default Title","offer_id":54276512448860,"sku":"ER-SFQL-R47-BK","price":49.95,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0897\/3467\/6828\/files\/sup-fin-river-touring-flexible-quick-lock-single-fin-eisbach-riders-7267534.png?v=1763231532"},{"product_id":"sup-race-fin-us-box","title":"SUP Race Fin - US-Box","description":"\u003cp data-start=\"54\" data-end=\"381\"\u003eEngineered for paddlers who value both \u003cstrong data-start=\"93\" data-end=\"127\"\u003eperformance and sustainability\u003c\/strong\u003e, the Eisbach Riders \u003cstrong data-start=\"148\" data-end=\"169\"\u003e7.3\" SUP Race Fin\u003c\/strong\u003e delivers fast glide, precise tracking, and reliable control. Its streamlined shape helps your board maintain speed and direction with fewer corrective strokes — ideal for racing, touring, and efficient paddling.\u003c\/p\u003e\n\u003cp data-start=\"383\" data-end=\"540\"\u003eCrafted with \u003cstrong data-start=\"396\" data-end=\"428\"\u003eGerman engineering precision\u003c\/strong\u003e and eco-conscious materials, this fin balances performance with durability while reducing environmental impact.\u003c\/p\u003e\n\u003cp data-start=\"542\" data-end=\"724\"\u003eWhether you’re paddling long distances on lakes, training on rivers, or exploring coastal waters, the \u003cstrong data-start=\"644\" data-end=\"661\"\u003e7.3\" Race Fin\u003c\/strong\u003e keeps your board fast, stable, and responsive in every stroke.\u003c\/p\u003e","brand":"Eisbach Riders","offers":[{"title":"Default Title","offer_id":56840338473308,"sku":"ER-SFUS-R73-BK","price":59.95,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0897\/3467\/6828\/files\/eisbach-riders-race-fin-7-25.jpg?v=1772027444"}],"url":"https:\/\/www.eisbach-riders.com\/collections\/sup-fin-compatibility-us-box-slide-in-smartlock.oembed","provider":"Eisbach Riders Surfing Company","version":"1.0","type":"link"}