{"product_id":"magorfas-4-leaf-double-eye-trailer-spring-set-25-1-4-1-750-lb-per-spring-includes-u-bolt-kit","title":"Magorfas 4-Leaf Double-Eye Trailer Spring Set 25-1\/4\" – 1,750 lb per Spring, Includes U-Bolt Kit","description":"\u003cstrong\u003eMagorfas 4-leaf double-eye trailer spring set delivers 1,750 lb capacity per spring (3,500 lb axle) in a 25-1\/4\" eye-to-eye length and includes a full U-bolt accessory kit.\u003c\/strong\u003e\n\n\u003cp\u003eThis replacement leaf spring kit is built for single-axle trailers that use SW4B-style suspension. Each spring is manufactured from 60Si2Mn manganese steel for improved toughness and fatigue life, then finished with two layers of corrosion-resistant paint. The set includes two springs plus U-bolts, tie plates, and nuts sized for a 2-3\/8\" round axle, so you get the spring hardware needed to reinstall quickly.\u003c\/p\u003e\n\n\u003ch3\u003eHow does this spring match my trailer's load and axle?\u003c\/h3\u003e\n\u003cp\u003eEach leaf spring is rated at 1,750 pounds; two springs pair to support a 3,500-pound axle capacity. Confirm your trailer’s axle rating and the SW4B fitment before ordering to ensure correct capacity and geometry.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCapacity: 1,750 lb per spring, 3,500 lb per axle when paired\u003c\/li\u003e\n  \u003cli\u003eDesigned for SW4B fitment and round axles 2-3\/8\" diameter\u003c\/li\u003e\n  \u003cli\u003eEye-to-eye length: 25-1\/4\" with 3\" free arch\u003c\/li\u003e\n  \u003cli\u003eNot intended for cars, trucks, vans, tractors, or non-trailer vehicles\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat are the key dimensions and materials I need to know?\u003c\/h3\u003e\n\u003cp\u003eThe leaf stack is composed of four spring leaves, each 1-3\/4\" wide and 5\/16\" thick, with a 9\/16\" bushing diameter to accept standard pins. The steel alloy and finish are selected to balance strength, flexibility and corrosion resistance for trailer service life.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eStack: 4 leaves; leaf width 1-3\/4\"; thickness 5\/16\"\u003c\/li\u003e\n  \u003cli\u003eBushing ID: 9\/16\" to match common shackles and hangers\u003c\/li\u003e\n  \u003cli\u003eFree open (arch): 3\" for ride height and load distribution\u003c\/li\u003e\n  \u003cli\u003eMaterial: 60Si2Mn manganese steel with two-coat painted finish\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat comes in the accessory kit and how does it install?\u003c\/h3\u003e\n\u003cp\u003eThe kit includes four 5-1\/2\" long U-bolts (1\/2\" diameter), two tie plates sized for 1-3\/4\" leaf springs, and eight 1\/2\"-20 hex nuts — everything needed to clamp the leaf pack to a 2-3\/8\" round axle beam. Installation follows standard trailer spring replacement steps: secure spring to hanger and shackle, align over axle, clamp with tie plates and U-bolts, then torque nuts to spec.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eIncludes 4 x 5-1\/2\" U-bolts (1\/2\" dia) and 8 hex nuts\u003c\/li\u003e\n  \u003cli\u003e2 tie plates sized for 1-3\/4\" leaf springs ensure proper clamping\u003c\/li\u003e\n  \u003cli\u003eKit intended for round axle beams 2-3\/8\" diameter\u003c\/li\u003e\n  \u003cli\u003eShips as a set of two springs (left + right) for single axle replacement\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for? If you own or maintain single-axle trailers built to SW4B specifications and need a reliable replacement leaf spring rated for 1,750 lb per spring, this Magorfas kit is designed for that purpose. It is ideal for trailer owners, fleet managers, and repair shops replacing worn or broken trailer springs on utility, boat, landscape, or enclosed cargo trailers. Do not use this product on passenger cars, trucks, vans, tractors or any vehicle other than the trailer types specified.\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 my SW4B trailer axle?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes, these springs are designed for SW4B fitment and pair for a 3,500 lb axle; confirm axle diameter is 2-3\/8\" and load rating matches.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Are these leaf springs suitable for cars or trucks?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: No. These springs are intended only for trailers and not for any cars, trucks, vans, or tractors.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Magorfas","offers":[{"title":"Default Title","offer_id":48082858967198,"sku":"B0BY8PHCRW","price":114.47,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/magorfas-front-view-leaf-spring.jpg?v=1785816820","url":"https:\/\/northtrailauto.ca\/products\/magorfas-4-leaf-double-eye-trailer-spring-set-25-1-4-1-750-lb-per-spring-includes-u-bolt-kit","provider":"North Trail Auto","version":"1.0","type":"link"}