{"product_id":"7000-round-spindle-42-12-x-2-25-flanged-5-bolt-7-21-tail-not-lubed-sp-22542f-7-21","title":"#42 Weld-On Spindle - 7000lb Capacity - 2.25\" Flanged Round Tail (SP-22542F-7.21)","description":"\u003cstyle\u003e\n  .rp-mag-lock{\n    --rp-black:#111111;\n    --rp-charcoal:#1d1d1f;\n    --rp-gray:#6b7280;\n    --rp-light:#f5f5f5;\n    --rp-line:#d8d8d8;\n    --rp-maroon:#6e0f11;\n    --rp-gold:#d7a126;\n    --rp-cream:#fff7e3;\n    --rp-shadow:0 16px 36px rgba(0,0,0,.08);\n    --rp-radius:20px;\n    font-family:\"Helvetica Neue\",Helvetica,Arial,sans-serif;\n    color:var(--rp-black);\n    line-height:1.6;\n  }\n\n  .rp-mag-lock *{\n    box-sizing:border-box;\n  }\n\n  .rp-mag-lock .rp-shell{\n    max-width:1080px;\n    margin:0 auto;\n    padding:28px 18px 40px 18px;\n    background: linear-gradient(180deg,#fafafa 0%,#ffffff 22%,#ffffff 100%);\n  }\n\n  .rp-mag-lock .rp-hero{\n    position:relative;\n    overflow:hidden;\n    border:1px solid #ececec;\n    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display:grid;\n    grid-template-columns:repeat(2,minmax(0,1fr));\n    gap:16px;\n  }\n\n  .rp-mag-lock .rp-feature{\n    border:1px solid #ececec;\n    border-radius:18px;\n    padding:18px;\n    background:#fff;\n    box-shadow:var(--rp-shadow);\n  }\n\n  .rp-mag-lock .rp-feature h3{\n    margin:0 0 8px 0;\n    font-size:17px;\n    line-height:1.25;\n    color:var(--rp-charcoal);\n  }\n\n  .rp-mag-lock .rp-feature p{\n    margin:0;\n    font-size:15px;\n    color:#333;\n  }\n\n  .rp-mag-lock .rp-table-wrap{\n    background:#fff;\n    border:1px solid #ececec;\n    border-radius:20px;\n    overflow:hidden;\n    box-shadow:var(--rp-shadow);\n  }\n\n  .rp-mag-lock table{\n    width:100%;\n    border-collapse:collapse;\n    font-size:15px;\n    background:#fff;\n  }\n\n  .rp-mag-lock th, .rp-mag-lock td{\n    padding:12px 14px;\n    text-align:left;\n    vertical-align:top;\n    border-bottom:1px solid #e8e8e8;\n  }\n\n  .rp-mag-lock th{\n    background:#171717;\n    color:#fff;\n    font-size:13px;\n    text-transform:uppercase;\n    letter-spacing:.08em;\n    font-weight:700;\n  }\n\n  .rp-mag-lock tr:nth-child(even) td{\n    background:#fafafa;\n  }\n\n  .rp-mag-lock .rp-note{\n    margin:18px 0 0 0;\n    padding:14px 16px;\n    border-radius:16px;\n    background:#f8f8f8;\n    border:1px solid #eaeaea;\n    font-size:14px;\n    color:#333;\n  }\n\n  .rp-mag-lock .rp-footer{\n    text-align:center;\n    margin:32px 0 0 0;\n  }\n\n  .rp-mag-lock .rp-footer img{\n    max-width:100%;\n    height:auto;\n    border-radius:18px;\n  }\n\n  @media (max-width: 900px){\n    .rp-mag-lock .rp-grid-2, .rp-mag-lock .rp-feature-grid, .rp-quick-spec-grid{\n      grid-template-columns: 1fr;\n    }\n    .rp-quick-spec-grid{\n      grid-template-columns: 1fr 1fr;\n    }\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"rp-mag-lock\"\u003e\n\u003cdiv class=\"rp-shell\"\u003e\n\u003cdiv class=\"rp-hero\"\u003e\n\u003cdiv class=\"rp-logo\"\u003e\u003cimg alt=\"R \u0026amp; P Carriages\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/2659\/6148\/files\/LOGO-FINALx200.png?v=1763669885\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"rp-kicker\"\u003eAxle Fabrication \/ #42 Spindle System\u003c\/div\u003e\n\u003ch1 class=\"rp-title\"\u003e#42 Weld-On Spindle - 7000lb Capacity - 2.25\" Flanged Round Tail\u003c\/h1\u003e\n\u003cp class=\"rp-subhead\"\u003ePrecision-machined #42 tapered spindle for 7,000 lb axles. Features a pre-welded 5-bolt brake flange for standard 12\" x 2.25\" brake assemblies.\u003c\/p\u003e\n\u003cdiv class=\"rp-partline\"\u003e\n\u003cspan class=\"rp-badge\"\u003eSKU: SP-22542F-7.21\u003c\/span\u003e \u003cspan class=\"rp-badge alt\"\u003e3,500 lb Capacity \/ Side\u003c\/span\u003e \u003cspan class=\"rp-badge alt\"\u003eNon-Lubed Solid Core\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"rp-quick-spec-grid\"\u003e\n\u003cdiv class=\"rp-quick-spec-item\"\u003e\n\u003cspan\u003eTail Diameter\u003c\/span\u003e \u003cstrong\u003e2.25\" Round\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"rp-quick-spec-item\"\u003e\n\u003cspan\u003eTail Length\u003c\/span\u003e \u003cstrong\u003e7.21\" (Weldable)\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"rp-quick-spec-item\"\u003e\n\u003cspan\u003eBrake Flange\u003c\/span\u003e \u003cstrong\u003e5-Bolt Pattern\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"rp-quick-spec-item\"\u003e\n\u003cspan\u003eSpindle Type\u003c\/span\u003e \u003cstrong\u003e#42 Tapered\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"rp-section rp-grid-2\"\u003e\n\u003cdiv class=\"rp-card\"\u003e\n\u003cdiv class=\"rp-rule-title\"\u003e\n\u003ch2\u003eOverview\u003c\/h2\u003e\n\u003c\/div\u003e\n\u003cp class=\"rp-lead\"\u003eThis R\u0026amp;P Carriages #42 weld-on spindle is a high-quality replacement solution designed for 7,000 lb axle applications where measurements and mounting points match. Engineered for heavy-duty trailer builds, the 7.21\" extended tail ensures deep structural engagement when welded into a 3\" axle tube. The integrated 5-bolt flange comes factory-welded, allowing for a direct bolt-on installation of standard 12\" trailer brake backing plates.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"rp-card rp-service\"\u003e\n\u003ch2\u003eR\u0026amp;P Service Insight\u003c\/h2\u003e\n\u003cp\u003eThis is a solid-steel spindle (Non-Lubed). It is preferred by fabricators who prioritize maximum core strength for heavy equipment haulers and dump trailers.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDeep Seat:\u003c\/strong\u003e The 7.21\" tail allows for multiple plug-weld points.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard Journals:\u003c\/strong\u003e Uses industry-standard 1.75\" \/ 1.25\" bearing set.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePro-Grade:\u003c\/strong\u003e 1045 cold-rolled steel construction.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"rp-section\"\u003e\n\u003cdiv class=\"rp-card rp-knowledge\"\u003e\n\u003ch2\u003eR\u0026amp;P Knowledge Hub\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed for use with #42 hubs and 12\" x 2.25\" brakes. Requires bearing 25580 (Inner) and 14125A (Outer).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eVehicle \/ System Fit:\u003c\/strong\u003e Standard fitment for 7,000 lb utility, flatbed, and tandem axle equipment trailers.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eInstallation Notes:\u003c\/strong\u003e Verify your axle tube ID is 2.25\". Requires professional circumferential and plug welding to the axle tube.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePerformance Insight:\u003c\/strong\u003e The non-lubed solid core design eliminates the internal hollow channel, offering higher resistance to bending under extreme radial loads.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"rp-section\"\u003e\n\u003cdiv class=\"rp-card rp-knowledge\"\u003e\n\u003ch2\u003eBrand \u0026amp; Fitment Note\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eSelling Brand:\u003c\/strong\u003e R\u0026amp;P Carriages \/ Aftermarket Replacement\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eApplication Reference:\u003c\/strong\u003e Any OEM names (e.g. Dexter) describe compatibility and fitment style only. This is an R\u0026amp;P Carriages curated component.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBefore Ordering:\u003c\/strong\u003e Confirm your axle tube dimensions. This spindle tail is 2.25\" round and intended for 3\" OD tubing with appropriate wall thickness.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"rp-section\"\u003e\n\u003cdiv class=\"rp-card rp-service\"\u003e\n\u003ch2\u003eR\u0026amp;P Repair Insight\u003c\/h2\u003e\n\u003cp\u003eWhen replacing a bent or damaged spindle, always check the interior of your axle tube for debris or warping from the previous failure.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeal Check:\u003c\/strong\u003e Uses a 2.25\" seal journal (Seal 10-36). Always use a new seal when installing a new spindle.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlange Alignment:\u003c\/strong\u003e The flange is pre-welded; ensure your axle tube is clocked correctly before welding the tail to the tube.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHub Fit:\u003c\/strong\u003e This spindle is compatible with 8-lug hubs designed for #42 spindle journals.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"rp-section\"\u003e\n\u003cdiv class=\"rp-rule-title\"\u003e\n\u003ch2\u003eFeatures\u003c\/h2\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"rp-feature-grid\"\u003e\n\u003cdiv class=\"rp-feature\"\u003e\n\u003ch3\u003eIntegrated 5-Bolt Flange\u003c\/h3\u003e\n\u003cp\u003eFactory-welded for precise alignment with 12\" electric or hydraulic brake assemblies.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"rp-feature\"\u003e\n\u003ch3\u003e7.21\" Extended Tail\u003c\/h3\u003e\n\u003cp\u003eExtra-long tail provides more surface area for structural welding and plug welds.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"rp-feature\"\u003e\n\u003ch3\u003eSolid Cold-Rolled Steel\u003c\/h3\u003e\n\u003cp\u003eConstructed from high-tensile 1045 steel for maximum durability under heavy loads.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"rp-feature\"\u003e\n\u003ch3\u003ePrecision #42 Taper\u003c\/h3\u003e\n\u003cp\u003eMachined to exacting tolerances for standard 25580\/14125A bearing combinations.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"rp-section rp-grid-2\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"rp-rule-title\"\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"rp-table-wrap\"\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003ePart Number\u003c\/th\u003e\n\u003ctd\u003eSP-22542F-7.21\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCapacity\u003c\/th\u003e\n\u003ctd\u003e3,500 lbs (7,000 lb Axle)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTail Diameter\u003c\/th\u003e\n\u003ctd\u003e2.25\" Round\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTail Length\u003c\/th\u003e\n\u003ctd\u003e7.21\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBrake Flange\u003c\/th\u003e\n\u003ctd\u003e5-Bolt Pattern\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eLubrication\u003c\/th\u003e\n\u003ctd\u003eNon-Lubed (Solid)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"rp-rule-title\"\u003e\n\u003ch2\u003eFitment \/ Application\u003c\/h2\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"rp-table-wrap\"\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eInner Bearing\u003c\/th\u003e\n\u003ctd\u003e25580 (1.750\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOuter Bearing\u003c\/th\u003e\n\u003ctd\u003e14125A (1.250\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eGrease Seal\u003c\/th\u003e\n\u003ctd\u003e2.250\" (10-36)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAxle Tube ID\u003c\/th\u003e\n\u003ctd\u003e2.25\" Round\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBrake Size\u003c\/th\u003e\n\u003ctd\u003e12\" x 2.25\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"rp-section\"\u003e\n\u003cdiv class=\"rp-rule-title\"\u003e\n\u003ch2\u003eIncluded Components\u003c\/h2\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"rp-table-wrap\"\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eQuantity\u003c\/th\u003e\n\u003cth\u003eItem\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003ctd\u003e#42 Round Weld-on Spindle w\/ 5-Bolt Flange\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003ctd\u003e1\"-14 Spindle Castle Nut\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003ctd\u003e1\" Spindle Washer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003ctd\u003eCotter Pin\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"rp-note\"\u003eVerify all measurements and bearing journals (1.75\" and 1.25\") before installation. Professional welding is required. OEM references in this listing describe application fitment only.\u003c\/div\u003e\n\u003cdiv class=\"rp-footer\"\u003e\u003cimg alt=\"R \u0026amp; P Carriages\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/2659\/6148\/files\/Baseball_AdvertisingRP-sign_1.jpg?v=1771533480\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Need a Trailer Part","offers":[{"title":"Default Title","offer_id":51786146283806,"sku":"SP-22542F-7.21","price":64.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2659\/6148\/files\/SP-22542F-7.21-Brochure.png?v=1777327851","url":"https:\/\/needatrailerpart.com\/products\/7000-round-spindle-42-12-x-2-25-flanged-5-bolt-7-21-tail-not-lubed-sp-22542f-7-21","provider":"Need a Trailer Part","version":"1.0","type":"link"}