Ruikarhop trailer hub and axle bearing kit — 4-set repair for 5200–7000 lb tandem axles (25580/14125A) with chrome steel bearings

Ruikarhop 25580 14125A boat trailer hub and axle bearing kit supplies four complete sets of bearings, races, seals and hardware engineered to service 5200–7000 lb tandem axles with 1.25"–1.75" spindles.

This comprehensive repair kit gathers the inner and outer bearings, races, grease seals and all small parts needed to rebuild four trailer hubs. All components are specified to match #D42-style spindles and are manufactured from chrome steel with double-lip seals to help reduce grease loss and contamination. The package arrives organized to reduce handling during installation and minimize part damage in transit.

What parts are included and why does that matter?

The kit contains every wear item required for four hub assemblies so you don’t need to source separate pieces. Having matched bearings and races ensures proper fit and smooth rotation; the additional seals and hardware complete the assembly and protect the internals.

• 4 inner bearings (25580) with 1.75" inner diameter
• 4 inner races (25520) and 4 outer bearings (14125A) with 1.25" inner diameter
• 4 outer races (14276), 8 grease seals (22333TB) with double-lip design
• 4 cotter pins, 4 dust caps, 4 rubber plugs, 4 spindle nuts and 4 washers

How does this kit hold up under towing conditions?

Components are made from chrome steel and are tested for durability and quiet rotation at higher speeds. Properly installed bearings and seals minimize friction and guard against premature failure caused by heat or contamination. The double-lip grease seals offer added protection against water and road debris common in marine and trailer use.

• Chrome steel bearings for strength and longevity
• Double-lip grease seals to reduce grease leakage and ingress
• Balanced selection of inner and outer parts for reliable rotation
• Prepackaged sets to prevent part mix-ups during install

Will these parts fit my trailer spindles and axle rating?

This kit fits tandem-axle trailers rated between 5200 and 7000 pounds that use the common #D42 spindle dimensions. It covers spindles with inner diameter ranges of approximately 1.25" to 1.75", matching the included bearing sizes. Always cross-check spindle measurements and OEM part numbers before ordering to confirm compatibility.

• Intended for 5200–7000 lb tandem axle trailers
• Matches #D42-style spindle dimensions
• Includes both 1.25" and 1.75" bearing fittings needed for these spindles
• Verify spindle ID and part numbers before installation

What should I expect during installation and maintenance?

Installation follows standard hub rebuild procedures: remove the old bearings, clean the hub, install the races, press the bearings, fit seals and torque the spindle nut to spec. Grease the bearings thoroughly and recheck adjustment after a short shakedown tow. Proper installation and periodic re-greasing extend service life and reduce noise.

• Press races into the hub and seat them fully
• Pack bearings with appropriate wheel bearing grease
• Adjust spindle nut preload and secure with cotter pin
• Inspect seals and repack grease at recommended service intervals

Who this kit is for: This Ruikarhop kit suits boat owners, tow professionals and DIY trailer technicians who need a ready-made repair package for tandem axles rated 5200–7000 lb. It’s aimed at customers who prefer a single purchase with matched bearings, seals and hardware for four hubs—especially useful for seasonal maintenance or restoring trailer hubs after water exposure. If you’re unsure about fit, measure your spindle diameters and consult your trailer manual before purchase.