{"product_id":"racewill-trailer-hub-bearing-kit-4-set-for-d42-spindles-25580-14125a-seals-caps","title":"Racewill Trailer Hub Bearing Kit 4-Set for D42 Spindles - 25580 \u0026 14125A, seals \u0026 caps","description":"\u003cb\u003eRacewill 4 Sets 25580\/14125A boat trailer axle bearing kits are a complete replacement package engineered to restore smooth, reliable wheel rotation on tandem 5200–7000 lb trailers with D42 spindles.\u003c\/b\u003e\n\n\u003cp\u003eIf you need to replace worn bearings on a tandem-axle boat trailer, this Racewill kit supplies all the parts for four hubs so you can service both sides at once. The kits include inner and outer bearings and races, grease seals, dust caps, spindle nuts and small hardware — everything needed for a full hub rebuild. All components are made from alloy steel and designed for trailer-duty loads and marine-adjacent environments.\u003c\/p\u003e\n\n\u003ch3\u003eWhat components are included in each 4-set package?\u003c\/h3\u003e\n\u003cp\u003eEach package contains the complete hardware to rebuild four wheel hubs: inner and outer bearings and races for each hub, grease seals, dust caps, spindle nuts and the small parts that are easy to lose during maintenance. This makes the kit a one-stop replacement for worn or damaged wheel-end parts.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e4x inner bearings 25580 (I.D. 1.75\")\u003c\/li\u003e\n  \u003cli\u003e4x inner races 25520\u003c\/li\u003e\n  \u003cli\u003e4x outer bearings 14125A (I.D. 1.25\")\u003c\/li\u003e\n  \u003cli\u003e4x outer races 25520\u003c\/li\u003e\n  \u003cli\u003e8x grease seals 22333TB\u003c\/li\u003e\n  \u003cli\u003e4x cotter pins, 4x dust caps, 4x rubber plugs\u003c\/li\u003e\n  \u003cli\u003e4x spindle nuts, 4x washers\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill these bearings fit my trailer and spindle?\u003c\/h3\u003e\n\u003cp\u003eThe Racewill kit is specified for tandem axles rated roughly 5200–7000 lb and is made to fit D42-style spindles with the stated inner and outer bearing dimensions. Check your spindle identification and bearing numbers before ordering; the inner and outer bearing ID sizes given let you confirm compatibility quickly.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eDesigned for 1.25\" to 1.75\" bearing ID configurations used on D42 spindles\u003c\/li\u003e\n  \u003cli\u003eIntended for tandem-axle trailers in the 5200–7000 lb range\u003c\/li\u003e\n  \u003cli\u003eVerify current bearing numbers (25580 \/ 14125A) to ensure match\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow do these parts make installation and maintenance easier?\u003c\/h3\u003e\n\u003cp\u003eRacewill supplies the small but essential accessories you need during a hub service, so you’re less likely to stop mid-job to source missing parts. The kit includes extra dust caps and rubber plugs plus shims, washers and spindle nuts to help you assemble and adjust each hub properly.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eExtra dust caps and rubber plugs reduce the chance of lost components\u003c\/li\u003e\n  \u003cli\u003eShims and washers provided for correct endplay adjustment\u003c\/li\u003e\n  \u003cli\u003eDouble-lip grease seals minimize leakage and retain lubrication\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eAre these bearings durable enough for boat trailers and seasonal use?\u003c\/h3\u003e\n\u003cp\u003eComponents are machined from resilient alloy steel and the seals use a double-lip design to help keep grease in and contaminants out, improving service life in wet and salty conditions when properly maintained. As with any trailer wheel bearing, regular inspection, cleaning and greasing prolongs lifespan and keeps towing safe.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003ePrecision-manufactured alloy-steel bearings and races\u003c\/li\u003e\n  \u003cli\u003eDouble-lip grease seals for improved leak resistance\u003c\/li\u003e\n  \u003cli\u003eDesigned for the repeated loads of trailer towing and launch ramps\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: This Racewill 4-set bearing kit is aimed at boat owners, DIY mechanics and trailer shops that need a full hub rebuild package for tandem-axle trailers with D42 spindles. It suits anyone who prefers to replace all wheel-end components at once to ensure balanced performance and to avoid multiple service trips. Confirm your spindle\/bearing numbers before purchase and follow proper installation and lubrication procedures for safe towing.\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: Do these kits fit D42 spindles?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes, they are specified for D42-style spindles using 25580 and 14125A bearings; confirm your spindle and bearing numbers first.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Are seals and dust caps included?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes — the kit includes 8 grease seals, 4 dust caps and 4 rubber plugs plus nuts and washers.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Racewill","offers":[{"title":"Default Title","offer_id":48080983621790,"sku":"B0CDL2945Y","price":103.98,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/racewill-front-packaging-assembled-kits.jpg?v=1785793765","url":"https:\/\/northtrailauto.ca\/products\/racewill-trailer-hub-bearing-kit-4-set-for-d42-spindles-25580-14125a-seals-caps","provider":"North Trail Auto","version":"1.0","type":"link"}