RigsNParts Trailer Hub Bearing Kit 4-Set for 5200–6000 lb Axles — 2.44” Dust Caps, Complete Hub Rebuilds

RigsNParts 4-set trailer hub bearing kit supplies complete axle-end components — bearings, races, seals, cotter pins and 2.44” dust caps — for 5200–6000 lb trailer axles with #42 spindles.

This kit bundles four full bearing assemblies to service both hubs on a tandem-axle trailer or to keep spares on hand. Engineered for EZ Lube and standard #42 spindle applications, the set covers inner and outer bearings (25580 and 15123 series), matching races, grease seals, cotter pins and rubber-plug dust caps sized 2.44”. Parts arrive cushioned in a foam box to minimize transit damage and are machined to deliver quiet rotation and reliable high-speed performance when installed correctly.

How do I know this kit fits my trailer axle?

Check your spindle type and bearing numbers. This RigsNParts kit is made specifically for axles rated 5200–6000 pounds and for spindles using the #42 bearing configuration.

• Fits EZ Lube and standard #42 spindles.
• Contains inner bearing 25580 (I.D. 1.75”) and outer bearing 15123 (I.D. 1.25”).
• Includes matching races 25520 and 15245 for proper seating.
• Seals sized #10-36 (I.D. 2.25”) and 2.44” dust caps included.

What parts come in each complete kit and why they matter?

Each kit provides a full set of components to rebuild one hub; the 4-set gives four complete hub rebuilds. Supplying both bearings and their corresponding races ensures correct bearing fit and load distribution.

• 4 × #15123 outer bearings and 4 × #15245 races for the outer positions.
• 4 × #25580 inner bearings and 4 × #25520 races for inner positions.
• 4 × grease seals (#10-36), 4 × cotter pins and 4 × 2.44” dust caps with rubber plug.
• Packaged in foam-lined box to protect precision components during shipping.

How will these bearings perform during towing and at higher speeds?

Components are manufactured from hardened materials and finished to minimize friction, producing quieter wheel rotation and stable operation at highway speeds when installed and greased properly. Proper lubrication and correct torqueing of the spindle nut are essential for longevity.

• Precision-machined surfaces reduce noise and heat build-up.
• High-speed rated for trailer towing within the axle’s load limits.
• Includes seals and dust caps to help retain grease and keep contaminants out.
• Follow axle manufacturer torque and maintenance intervals for best results.

Who is this for? RigsNParts’ 4-set bearing kit is aimed at trailer owners, fleet managers and DIY mechanics who maintain tandem-axle trailers, boat trailers or utility trailers rated 5,200–6,000 lb. It’s convenient for those rebuilding both hubs at once, stocking a garage with spare rebuild kits, or preparing a trailer for seasonal use. If you’re unsure about fit, verify your current bearing numbers or consult an axle spec sheet before ordering. RigsNParts offers customer support and a refund or replacement option if parts arrive damaged or don’t meet expectations.