{"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","url":"https:\/\/www.wtrailer.com\/products\/4-leaf-double-eye-trailer-spring-kit-3500-lb-axles-replaces-sw4b","provider":"Trailer Supplies","version":"1.0","type":"link"}