{"product_id":"greenough-4-a-single-fin","title":"True Ames Greenough 4-A Surfboard Fin","description":"\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cspan\u003eThe\u003c\/span\u003e\u003cspan\u003e Greenough 4-A Single Fin\u003c\/span\u003e\u003cspan\u003e is the most iconic, functional and versatile single fin available, because it works extremely well on just about every type of surfboard. The 4-A has been True Ames' bread and butte\u003cimg\u003er for over 40 years now, and it is still the most popular single fin design there is due to it's all-around and well-balanced performance.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFORM, FUNCTION \u0026amp; FEEL\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0583\/9758\/9686\/files\/Screen_Shot_2026-08-22_at_9.57.13_AM.png?v=1787417876\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eFORM |  \u003c\/strong\u003eMedium profile, full base coupled with a tapering \u0026amp; moderately flexible tip \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFUNCTION |\u003c\/strong\u003e \u003cmeta charset=\"utf-8\"\u003e\u003cspan\u003eA fin that will hold when you need it to and release when the time is right\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFEEL | \u003c\/strong\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cspan\u003eNeutral-positive, perfectly-balanced, a fin that will drive off the bottom, and have an acute responsiveness through arcing turns\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eOVERALL |\u003c\/strong\u003e \u003cmeta charset=\"utf-8\"\u003e\u003cspan\u003eVersatile - designed for all board shapes and surf conditions\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSPECIFICATIONS\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable width=\"100%\" style=\"width: 99.9397%; 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height: 19.6007px;\"\u003e\n\u003cmeta charset=\"utf-8\"\u003e \u003cspan\u003e10.08”\u003c\/span\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 26.8073%; height: 19.6007px;\"\u003e\n\u003cmeta charset=\"utf-8\"\u003e \u003cspan\u003e7.42”\u003c\/span\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 21.982%; height: 19.6007px;\"\u003e\u003cspan\u003e\u003cmeta charset=\"utf-8\"\u003e43.85”²\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6007px;\"\u003e\n\u003ctd style=\"width: 24.1506%; height: 19.6007px;\"\u003e\n\u003cmeta charset=\"utf-8\"\u003e \u003cspan\u003e10.5”\u003c\/span\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 26.0685%; height: 19.6007px;\"\u003e\n\u003cmeta charset=\"utf-8\"\u003e \u003cspan\u003e10.63”\u003c\/span\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 26.8073%; height: 19.6007px;\"\u003e\n\u003cmeta charset=\"utf-8\"\u003e \u003cspan\u003e7.91”\u003c\/span\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 21.982%; height: 19.6007px;\"\u003e\u003cspan\u003e\u003cmeta charset=\"utf-8\"\u003e48.44”²\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMATERIALS \u0026amp; FITMENT\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCONSTRUCTION | \u003c\/strong\u003eSolid Fiberglass\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFINISH |\u003c\/strong\u003e Matte\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFITMENT | \u003c\/strong\u003eSingle Fin Box\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAPPLICATION | \u003c\/strong\u003eScrew + Plate\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWHY YOU'LL LOVE THIS FIN\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul class=\"feature-list\"\u003e\n\u003cli\u003eThe 4A is perfect in so many ways. It checks all of the performance boxes. The solid-sized base and width create stability and drive, while the rake and flexible tip enable top-to-bottom turns and maneuverability.\u003c\/li\u003e\n\u003cli\u003eThe Greenough 4A is a bread-and-butter fin. It allows you to feel the shape of a surfboard, it never gets in the way, with it's perfectly neutral design, when sized correctly to the board it fades away and becomes one with your surfing. It holds you tight but lets you loose, and it gives you feedback but disappears- truly the most versatile fin on earth.\u003c\/li\u003e\n\u003cli\u003eThe true beauty of this fin is that you can ride it in any board that has a single fin box. The larger sizes (9\"-10.5\") are great for single fin longboards, the medium sizes (7.5\"- 9\") pair well with speed shapes and mid-lengths, and the smaller sizes (6.5\"- 8.5\") pair well with shortboard single fins and 2+1’s (boards with side fins).\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHISTORY \u0026amp; ORIGIN \u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cspan\u003eThe man behind this revolutionary fin is George Greenough, whom the surf world is forever indebted to for his wave-riding performance innovations beginning in the '60s. Greenough ultimately paved the way from traditional logging to more progressive surfing in the pocket through the development of his Velo-Spoon kneeboard designs. To complement his kneeboards, Greenough found inspiration from mother nature for his fin templates through studying the tail fins of tuna–one of the fastest and most maneuverable fish in the ocean. The subsequent high-aspect ratio design he created allowed surfers to place themselves in more critical parts of the wave and execute more radical turns; it truly ushered in a new era of high performance capability. History lesson aside, the Greenough 4-A is a truly well-balanced fin. Its full base coupled with a tapering, moderately flexible tip provides a solid amount of drive off the bottom, and an acute responsiveness through arcing turns. Designed for both speed generation and spending time surfing in the pocket, the 4-A is a fin that will hold when you need it to and release when the time is right.\u003c\/span\u003e\u003c\/p\u003e","brand":"True Ames","offers":[{"title":"6 \/ Black","offer_id":45376486211766,"sku":"107134","price":0.0,"currency_code":"USD","in_stock":false},{"title":"6 \/ Blue","offer_id":45376486539446,"sku":"107164","price":0.0,"currency_code":"USD","in_stock":false},{"title":"6 \/ Clear","offer_id":45376486867126,"sku":"107204","price":0.0,"currency_code":"USD","in_stock":false},{"title":"6 \/ Green","offer_id":45376487194806,"sku":"107154","price":0.0,"currency_code":"USD","in_stock":false},{"title":"6 \/ Kelp","offer_id":45376487522486,"sku":"107184","price":0.0,"currency_code":"USD","in_stock":false},{"title":"6 \/ Purple","offer_id":45376487850166,"sku":"107174","price":0.0,"currency_code":"USD","in_stock":false},{"title":"6 \/ 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