{"title":"3,500 lb Axles - leaf spring","description":"","products":[{"product_id":"4-leaf-double-eye-trailer-spring-kit-3500-lb-axles-replaces-sw4b","title":"3,500 lb Axles 25.25\" 4-Leaf Double Eye Trailer Springs 1-3\/4\" Wide","description":"\u003cp\u003ePerfect for suspension upgrades or replacements on trailers with 3,500 lb axles. Suitable for single or tandem axle setups on utility, boat, cargo, and livestock trailers.\u003c\/p\u003e\n\u003ch3 data-end=\"1090\" data-start=\"1062\"\u003e【One Spring】\u003c\/h3\u003e\n\u003cul data-end=\"1174\" data-start=\"1091\"\u003e\n\u003cli data-end=\"1142\" data-start=\"1091\"\u003e\n\u003cp data-end=\"1142\" data-start=\"1093\"\u003e(1) 4-leaf double eye trailer spring (1,750 lb)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1174\" data-start=\"1143\"\u003e\n\u003cp data-end=\"1174\" data-start=\"1145\"\u003ePre-installed nylon bushing\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003e【1 Pair】\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e(2) 4-leaf double eye trailer springs (1,750 lb each)\u003c\/li\u003e\n\u003cli\u003ePre-installed nylon bushings\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003e【2 Pair】\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e(4) 4-leaf double eye trailer springs (1,750 lb each)\u003c\/li\u003e\n\u003cli\u003ePre-installed nylon bushings\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003e【1 Pair + 1 U-Bolt Kit + Hanger Kit】\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e(2) 4-leaf double eye springs\u003c\/li\u003e\n\u003cli\u003e(4) U-bolts – 5.5\", for 2-3\/8\" axle, 1\/2\"-20 thread\u003c\/li\u003e\n\u003cli\u003e(2) Tie plates\u003c\/li\u003e\n\u003cli\u003e(8) Lock nuts\u003c\/li\u003e\n\u003cli\u003e(2) Front hangers (1-1\/2\")\u003c\/li\u003e\n\u003cli\u003e(2) Rear hangers (7\/8\")\u003c\/li\u003e\n\u003cli\u003e(4) Shackle straps – 2-5\/8\" (9\/16\" holes)\u003c\/li\u003e\n\u003cli\u003e(6) Shackle bolts – 3\" × 9\/16\"\u003c\/li\u003e\n\u003cli\u003e(6) Lock nuts\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003e【2 Pair + 2 U-Bolt Kit + Hanger Kit】\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e(4) 4-leaf double eye springs\u003c\/li\u003e\n\u003cli\u003e(8) U-bolts + (4) tie plates\u003c\/li\u003e\n\u003cli\u003e(6) Hangers (2 front, 2 rear, 2 center)\u003c\/li\u003e\n\u003cli\u003e(2) Equalizers – 7-3\/4\"\u003c\/li\u003e\n\u003cli\u003e(8) Shackle straps\u003c\/li\u003e\n\u003cli\u003e(14) Bolts\u003c\/li\u003e\n\u003cli\u003e(14) Lock nuts\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003e【1 Pair + 1 U-Bolt Kit】\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e(2) 4-leaf double eye springs\u003c\/li\u003e\n\u003cli\u003e(4) U-bolts – 5.5\", for 2-3\/8\" axle, 1\/2\"-20 thread\u003c\/li\u003e\n\u003cli\u003e(2) Tie plates\u003c\/li\u003e\n\u003cli\u003e(8) Lock nuts\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBuilt for 3,500 lb Axles\u003c\/strong\u003e – Each spring rated at 1,750 lbs for a total capacity of 3,500 lbs per axle.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeavy-Duty Steel Construction\u003c\/strong\u003e – Made from 60Si2Mn manganese steel, heat-treated for strength, and finished with corrosion-resistant coating.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Compatibility\u003c\/strong\u003e – Direct replacement for SW4B, LIB-401-DE, 124903, PR4B.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSmooth Ride\u003c\/strong\u003e – Double-eye design for stable, balanced suspension when paired with standard hangers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMultiple Kit Options\u003c\/strong\u003e – Available as springs only, with U-bolt kits, or with complete hanger kits for full suspension replacement.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eOEM \u0026amp; Compatibility\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eReplaces:\u003c\/strong\u003e SW4B, LIB-401-DE, 124903, PR4B, A226, K71-403-00\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eFits:\u003c\/strong\u003e Standard 3,500 lb axles with 1-3\/4\" wide double eye leaf springs\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAxle Types:\u003c\/strong\u003e Utility, boat, cargo, and livestock trailers\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"TRAILER SUPPLIES","offers":[{"title":"1 Pair","offer_id":47308918489317,"sku":null,"price":52.99,"currency_code":"USD","in_stock":true},{"title":"2 Pair","offer_id":47308918522085,"sku":null,"price":103.98,"currency_code":"USD","in_stock":true},{"title":"1 Pair+1 Ubolt Kit+1 Hanger Kit","offer_id":47308918554853,"sku":null,"price":104.99,"currency_code":"USD","in_stock":true},{"title":"2Pair+2 Ubolt Kit+1 Hanger Kit","offer_id":47308918587621,"sku":null,"price":199.99,"currency_code":"USD","in_stock":true},{"title":"1 Pair+1 Ubolt Kit","offer_id":47308918620389,"sku":null,"price":73.99,"currency_code":"USD","in_stock":true},{"title":"1 kit","offer_id":47608040685797,"sku":null,"price":52.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0737\/0227\/7349\/files\/WA-212-ZT-1PAIR.jpg?v=1754336871"},{"product_id":"3500-lb-axles-25-25-4-leaf-double-eye-trailer-springs-1-3-4-wide-hanger-kits","title":"3,500 lb Axles 25.25\" 4-Leaf Double Eye Trailer Springs 1-3\/4\" Wide Hanger Kits","description":"\u003ch3\u003eProduct Description:\u003c\/h3\u003e\n\u003cp\u003eBuilt to support heavy loads while smoothing out the rider, the Trailer Supplies 4-leaf double eye spring is a reliable suspension component engineered for 3,500 lb trailer axles. Its four stacked steel leaves flex to absorb road shock and reduce wear and tear on your trailer frame, helping maintain proper axle alignment and ensure a level, controlled ride even over rough surfaces. \u003c\/p\u003e\n\u003cp\u003eMeasuring 25-1\/4\" eye-to-eye with a 1-3\/4\" width, this leaf spring includes pre-installed 9\/16\" nylon bushings for quieter operation and easier mounting to your trailer's suspension system. The double eye design allows secure attachment to both the hanger and shackle hardware and works well for a variety of single-axle applications, from utility and camping trailers to cargo and equipment haulers. \u003c\/p\u003e\n\u003cp\u003eMultiple kit options are available as springs only, with U-bolt kits, or with complete hanger kits for full suspension replacement. This flexibility makes it easy to choose the right setup for your maintenance or upgrade needs,  whether you're replacing worn springs or building a new trailer suspension. \u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eWhat's include: \u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003e1 Pair + 1 U-Bolt Kit + Hanger Kit for single axle: \u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e(2) 4-leaf double eye springs\u003cbr\u003e(4) U-bolts – 5.5\", for 2-3\/8\" axle, 1\/2\"-20 thread\u003cbr\u003e(2) Tie plates\u003cbr\u003e(8) Nuts \u0026amp; lock washers\u003cbr\u003e(2) Front hangers (1-1\/2\")\u003cbr\u003e(2) Rear hangers (7\/8\")\u003cbr\u003e(4) Shackle straps – 2-5\/8\" (9\/16\" holes)\u003cbr\u003e(6) Shackle bolts – 3\" × 9\/16\"\u003cbr\u003e(6) Lock nuts\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e2 Pair + 2 U-Bolt Kit + Hanger Kit for tandem axle: \u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e(4) 4-leaf double eye springs\u003cbr\u003e(8) U-bolts \u003cbr\u003e(4) tie plates\u003cbr\u003e(16) nuts \u0026amp; lock washers\u003cbr\u003e(6) Hangers (2 front, 2 rear, 2 center)\u003cbr\u003e(2) Equalizers – 7-3\/4\"\u003cbr\u003e(8) Shackle straps\u003cbr\u003e(14) Bolts\u003cbr\u003e(14) Lock nuts\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e1 Pair + 1 U-Bolt Kit \u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e(2) 4-leaf double eye springs\u003cbr\u003e(4) U-bolts – 5.5\", for 2-3\/8\" axle, 1\/2\"-20 thread\u003cbr\u003e(2) Tie plates\u003cbr\u003e(8) Nuts \u0026amp; lock washers\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eOEM \u0026amp; Compatibility\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eReplaces:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eSW4B, LIB-401-DE, 124903, PR4B, A226, K71-403-00\u003cbr\u003e\u003cstrong style=\"font-size: 0.875rem;\"\u003eFits:\u003c\/strong\u003e\u003cspan style=\"font-size: 0.875rem;\"\u003e \u003c\/span\u003e\u003cspan style=\"font-size: 0.875rem;\"\u003eStandard 3,500 lb axles with 1-3\/4\" wide double eye leaf springs\u003cbr\u003e\u003c\/span\u003e\u003cstrong\u003eAxle Types:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eUtility, boat, cargo, and livestock trailers\u003c\/p\u003e","brand":"TRAILER SUPPLIES","offers":[{"title":"1 Pair+1 Ubolt Kit","offer_id":47627607998693,"sku":null,"price":73.99,"currency_code":"USD","in_stock":true},{"title":"1 Pair+1 Ubolt Kit+1 Hanger Kit","offer_id":47627608031461,"sku":null,"price":104.99,"currency_code":"USD","in_stock":true},{"title":"2Pair+2 Ubolt Kit+1 Hanger Kit","offer_id":47627608064229,"sku":null,"price":199.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0737\/0227\/7349\/files\/61IWwELgD2L._AC_SL1500.jpg?v=1757022834"}],"url":"https:\/\/www.wtrailer.com\/collections\/3-500-lb-axles-leaf-spring.oembed","provider":"Trailer Supplies","version":"1.0","type":"link"}