{"product_id":"aeagle-4-leaf-double-eye-trailer-spring-kit-25-1-4-length-1-750-lb-per-spring-includes-u-bolts-hangers","title":"Aeagle 4-Leaf Double Eye Trailer Spring Kit — 25-1\/4\" Length, 1,750 lb Per Spring, Includes U-Bolts \u0026 Hangers","description":"\u003cp\u003e\u003cstrong\u003eAEagle 4-leaf double-eye trailer springs — a heavy-duty suspension kit providing 1,750 lb capacity per spring (3,500 lb axle) with U-bolts, hangers and hardware for 2-3\/8\" round trailer axles.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eDesigned as a direct-style replacement for SW4B-type setups (note: fits round, not square, axles), this AEagle suspension kit includes two 4-leaf springs and a full mounting hardware set so you can restore trailer ride height, load support and leaf-pack stability. Each spring measures 25-1\/4\" eye-to-eye, has a 3\" free length, and a 1-3\/4\" leaf width with solid bushings pre-installed. The package arrives pre-tested and protected with an anti-rust coating for long-term corrosion resistance.\u003c\/p\u003e\n\n\u003ch3\u003eHow will this kit fit my trailer axle?\u003c\/h3\u003e\n\u003cp\u003eThe kit is engineered for round trailer axles with a 2-3\/8\" diameter and is intended as a replacement for part number SW4B. Confirm axle shape and U-bolt dimensions before ordering to ensure compatibility.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eFits 2-3\/8\" round trailer axles only — not compatible with square axles.\u003c\/li\u003e\n  \u003cli\u003eSpring eye-to-eye length: 25-1\/4\"; free open height: 3\".\u003c\/li\u003e\n  \u003cli\u003eIncludes U-bolts sized for standard 3,500 lb trailer axles (4 x 5-1\/2\" long, 1\/2\" dia.).\u003c\/li\u003e\n  \u003cli\u003eTwo springs in the set provide 1,750 lb capacity each for a combined axle rating of 3,500 lb.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat hardware and hangers come with the suspension kit?\u003c\/h3\u003e\n\u003cp\u003eAEagle bundles the springs with a complete hanger and U-bolt kit so you have the fasteners and mounting plates required to reinstall the axle. The kit covers both front and rear mounting points and includes shackle hardware for a full suspension assembly.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eU-bolt kit: 4 x 5-1\/2\" long U-bolts, 1\/2\" diameter, 8 x 1\/2\"-20 hex nuts, tie plates for 1-3\/4\" leaf springs.\u003c\/li\u003e\n  \u003cli\u003eHanger set: 2 x 3\" tall hangers, 2 x 2.1\" tall hangers, 4 shackle straps (3.09\" eye-to-eye).\u003c\/li\u003e\n  \u003cli\u003eShackle bolts and locknuts: 6 x 9\/16\"-18 x 3\" long bolts with locknuts for secure installation.\u003c\/li\u003e\n  \u003cli\u003eTwo bushings are factory-installed per spring (9\/16\" bushing diameter).\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow durable and reliable are these leaf springs?\u003c\/h3\u003e\n\u003cp\u003eEach AEagle leaf spring is manufactured from high-grade raw material and finished with an anti-rust coating to resist corrosion in road and storage environments. Springs are quality-checked before dispatch and backed by a limited warranty.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eLeaf thickness: 5\/16\" per leaf; 4 leaves per spring for balanced load distribution.\u003c\/li\u003e\n  \u003cli\u003eProtective anti-corrosion coating prevents premature rusting in wet conditions.\u003c\/li\u003e\n  \u003cli\u003eTested prior to shipping; AEagle provides a 12-month warranty on workmanship.\u003c\/li\u003e\n  \u003cli\u003eAssembly note: tighten nuts horizontally to avoid affecting final performance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for? This AEagle 4-leaf double-eye suspension kit is suited to trailer owners, fleet operators, and DIY mechanics who need a dependable replacement for worn or damaged leaf springs on single 3,500 lb axles with 2-3\/8\" round tubing. Choose this kit if you want a complete hardware package—springs, U-bolts, hangers and shackles—so you can complete a full axle suspension service without sourcing parts separately. Verify axle shape and dimensions before purchasing to ensure a trouble-free fit.\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 fit square axles?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: No. This AEagle kit is made only for 2-3\/8\" round trailer axles and will not fit square axles.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What is the load capacity per spring and per axle?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Each spring supports 1,750 lb; two springs cover a 3,500 lb single axle capacity.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Aeagle","offers":[{"title":"Default Title","offer_id":48082887278750,"sku":"B0C1YYYXLQ","price":165.47,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/aeagle-front-packaging_d8e96625-0910-4e69-bceb-1c08c2017b23.jpg?v=1785818114","url":"https:\/\/northtrailauto.ca\/products\/aeagle-4-leaf-double-eye-trailer-spring-kit-25-1-4-length-1-750-lb-per-spring-includes-u-bolts-hangers","provider":"North Trail Auto","version":"1.0","type":"link"}