{"product_id":"aeagle-4-leaf-double-eye-trailer-spring-kit-for-3-500-lb-axle-25-1-4-length-1-750-lb-each-includes-u-bolts-hangers","title":"Aeagle 4-Leaf Double-Eye Trailer Spring Kit for 3,500 lb Axle — 25-1\/4\" Length, 1,750 lb Each, Includes U-Bolts \u0026 Hangers","description":"\u003cp\u003e\u003cstrong\u003eThe AEagle 4-leaf double-eye spring kit is a complete suspension replacement designed for 3,500 lb trailer axles, offering 1,750 lb capacity per spring with U-bolts, hangers and shackles included.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis all-in-one trailer suspension kit from AEagle replaces SW4B-style round-axle springs and gives you the parts to rebuild a single 3,500 lb axle assembly. It combines two 4-leaf, double-eye springs with a full U-bolt kit, hangers, shackle straps and fasteners — everything needed to restore ride height, support and axle alignment on trailers that use 1-3\/4\" wide leaf springs and 2-3\/8\" round axles.\u003c\/p\u003e\n\n\u003ch3\u003eWhat does the kit include and how does it fit my trailer?\u003c\/h3\u003e\n\u003cp\u003eThe kit is built for round trailer axles rated to 3,500 lb and includes two matching springs plus mounting hardware so you can service one axle. It replaces part number SW4B but is not compatible with square axles.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e2 x 4-leaf double-eye springs (1,750 lb capacity each)\u003c\/li\u003e\n  \u003cli\u003e4 x 5-1\/2\" long U-bolts, 1\/2\" diameter\u003c\/li\u003e\n  \u003cli\u003e2 x tie plates for 1-3\/4\" leaf springs, 8 x 1\/2\"-20 hex nuts\u003c\/li\u003e\n  \u003cli\u003eHanger kit: 2 x 3\" tall hangers, 2 x 2.1\" tall hangers\u003c\/li\u003e\n  \u003cli\u003e4 x shackle straps (eye-to-eye 3.09\"), 6 x 9\/16\"-18 shackle bolts with locknuts\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat are the key dimensions and load ratings?\u003c\/h3\u003e\n\u003cp\u003eKnowing the measurements helps ensure correct fit and safe loading. Each spring measures 25-1\/4\" eye-to-eye, 1-3\/4\" wide, with a 3\" free-open height and four leaves composed of 5\/16\" thick steel per leaf.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCapacity: 1,750 lb per spring (3,500 lb axle total)\u003c\/li\u003e\n  \u003cli\u003eEye-to-eye length: 25-1\/4\"; free-open: 3\"\u003c\/li\u003e\n  \u003cli\u003eWidth: 1-3\/4\"; leaf thickness: 5\/16\"; bushing dia: 9\/16\"\u003c\/li\u003e\n  \u003cli\u003e2 bushings installed per spring for secure mounting\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow durable is the AEagle spring and what maintenance tips matter?\u003c\/h3\u003e\n\u003cp\u003eAEagle uses high-quality raw steel and an anti-rust coating to extend service life and resist corrosion in wet or salty environments. Basic upkeep and correct installation will maximize performance and safety.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCorrosion-resistant coating for longer life in outdoor use\u003c\/li\u003e\n  \u003cli\u003eInspect bushings and bolts periodically for wear or looseness\u003c\/li\u003e\n  \u003cli\u003eImportant: tighten nuts horizontally to ensure proper fit and ride\u003c\/li\u003e\n  \u003cli\u003e12-month warranty and pre-shipment testing provided\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCan I install this kit myself and what should I watch for during installation?\u003c\/h3\u003e\n\u003cp\u003eExperienced DIYers with proper tools can install the kit, but safe installation requires lifting equipment and attention to torque and alignment. If unsure, use a qualified trailer mechanic to avoid safety risks.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eRequires jack stands or a lift for axle support during install\u003c\/li\u003e\n  \u003cli\u003eFollow torque specs for U-bolts and shackle bolts; tighten nuts horizontally\u003c\/li\u003e\n  \u003cli\u003eConfirm axle is round 2-3\/8\" diameter before purchasing\u003c\/li\u003e\n  \u003cli\u003eNot compatible with square axles — check axle type first\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho this is for: The AEagle 4-leaf double-eye spring kit is aimed at trailer owners, hobbyists and small fleet operators who need a reliable, OEM-style replacement for a 3,500 lb axle using 1-3\/4\" leaf springs. It’s ideal when you want a complete hardware set to rebuild one axle — including springs, U-bolts, hangers and shackles — and prefer corrosion-resistant components with a one-year warranty. If you have a square axle or need springs for a different capacity, choose a kit matched to those specific requirements.\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: Will these springs fit a square axle?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: No. These AEagle springs and hardware are made for 2-3\/8\" round axles only, not 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?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Each spring is rated at 1,750 lb, providing a combined 3,500 lb capacity for a single axle.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Aeagle","offers":[{"title":"Default Title","offer_id":55172618617175,"sku":"B0C1YYYXLQ","price":217.82,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/1524\/7191\/files\/aeagle-front-view-assembled-suspension-kit.jpg?v=1790453494","url":"https:\/\/britishgarage.co.uk\/products\/aeagle-4-leaf-double-eye-trailer-spring-kit-for-3-500-lb-axle-25-1-4-length-1-750-lb-each-includes-u-bolts-hangers","provider":"British Garage","version":"1.0","type":"link"}