{"product_id":"ozisens-trailer-axle-equalizer-kit-312l-for-3-500-5-200-lb-tandem-trailers-hardened-steel-black-oxide-complete-shackle-set","title":"OZISENS Trailer Axle Equalizer Kit 312L for 3,500–5,200 lb Tandem Trailers — Hardened Steel Black-Oxide Complete Shackle Set","description":"\u003cp\u003e\u003cstrong\u003eOZISENS 312L trailer axle equalizer and shackle kit is a complete replacement set engineered to service tandem-axle trailers rated between 3,500 and 5,200 pounds.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis kit bundles the equalizers, shackle straps, bushings, bolts and nuts needed to refresh or repair double-eye spring tandem suspension systems. Built from hardened steel with a black-oxidized finish, the components resist corrosion and hold alignment under towing loads. The kit is sized for common light- to medium-duty trailer axles, and includes clear part counts so you can verify fitment before installation.\u003c\/p\u003e\n\n\u003ch3\u003eWill this kit fit my trailer axle and springs?\u003c\/h3\u003e\n\u003cp\u003eConfirm fit by matching your trailer’s axle rating and the physical dimensions listed with the kit. It’s intended for tandem-axle setups using double-eye leaf springs and axles rated from 3,500 to 5,200 lb.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eDesigned for 3,500–5,200 lb axle capacities.\u003c\/li\u003e\n  \u003cli\u003eIncludes two 7-3\/4\" equalizers for tandem suspensions.\u003c\/li\u003e\n  \u003cli\u003eShackle straps measure 4.4\" with 3-1\/8\" (3.12\") hole spacing.\u003c\/li\u003e\n  \u003cli\u003eCheck existing spring eye and bolt diameters before ordering.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat hardware and dimensions come with the set?\u003c\/h3\u003e\n\u003cp\u003eThe package contains every fastener and bushing required to replace the equalizer and shackle assembly, reducing the need to source extra parts.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e2 x 7-3\/4\" EQ-E1 equalizers.\u003c\/li\u003e\n  \u003cli\u003e8 x 4.4\" shackle straps with 3-1\/8\" hole spacing.\u003c\/li\u003e\n  \u003cli\u003e14 x bolts at 3-3\/8\" length and matching 9\/16\"-18 self-locking nuts.\u003c\/li\u003e\n  \u003cli\u003e14 x nylon bushings with 9\/16\" I.D. and 11\/16\" O.D.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow durable and corrosion-resistant are the parts?\u003c\/h3\u003e\n\u003cp\u003eComponents are manufactured from hard-wearing steel with a protective surface finish to slow rust and maintain structural integrity under load. The design resists bending and abrasion common in trailer service environments.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eHardened steel construction for strength and wear resistance.\u003c\/li\u003e\n  \u003cli\u003eBlack oxidized and painted surface to reduce corrosion risk.\u003c\/li\u003e\n  \u003cli\u003eNylon bushings to reduce metal-on-metal wear.\u003c\/li\u003e\n  \u003cli\u003eSelf-locking nuts help prevent loosening from vibration.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat should I expect during installation?\u003c\/h3\u003e\n\u003cp\u003eInstallation is similar to other double-eye leaf spring equalizer kits; basic tools and standard mechanical experience are usually sufficient. Because the kit includes all bolts, nuts and bushings, you only need to confirm torque specs and alignment for your trailer model.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSupplied bolts and nuts cover both equalizer and shackle mounting points.\u003c\/li\u003e\n  \u003cli\u003eReplace old bushings with supplied nylon bushings for smoother pivoting.\u003c\/li\u003e\n  \u003cli\u003eVerify torque values from the trailer manufacturer before final tightening.\u003c\/li\u003e\n  \u003cli\u003eInspect spring eyes and perches for wear while replacing the kit.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: This OZISENS 312L equalizer and shackle kit is for trailer owners, repair shops, and fleet maintenance teams who need a full replacement kit for tandem-axle trailers between 3,500 and 5,200 lb. It’s suited to DIYers comfortable with suspension work and professionals seeking a complete parts set — including equalizers, shackle straps, nylon bushings, bolts and locking nuts — that reduces sourcing time and helps restore proper suspension articulation.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Does this kit include all bolts and nuts needed?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes — the kit supplies 14 bolts (3-3\/8\"), 14 self-locking nuts, and all required bushings for a full replacement.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can I use this on a single-axle trailer?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: This set is intended for tandem-axle systems with double-eye springs; single-axle use is not recommended without matching geometry.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"OZISENS","offers":[{"title":"Default Title","offer_id":67586271838393,"sku":"B0FHW5WF2B","price":142.24,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0822\/3765\/3177\/files\/ozisens-equalizer-front-view.jpg?v=1790482020","url":"https:\/\/redleafauto.ca\/products\/ozisens-trailer-axle-equalizer-kit-312l-for-3-500-5-200-lb-tandem-trailers-hardened-steel-black-oxide-complete-shackle-set","provider":"Redleaf Auto","version":"1.0","type":"link"}