Tgkjmad Trailer Bearing Kit 7000 lb Tandem Axle — 25580 & 14125A Bearings, Double‑Lip Seals

Tgkjmad Trailer Bearing Kit 7000 lb is a complete tandem-axle hub service kit that replaces inner 25580 and outer 14125A bearings, seals, races and hardware needed to restore reliable wheel rotation on 6,000–7,000 lb trailers.

If your boat trailer, utility trailer, or RV uses 8-lug hubs on 1-3/4" x 1-1/4" #42 spindles, this kit supplies the matched bearings, races, grease seals, spindle nuts, cotter pins, washers, dust caps and rubber plugs for a full hub repack and reassembly. Components are made from precision alloy steel and include double-lip NBR/steel grease seals to help retain lubricant under towing loads and resist road contamination. The kit is compatible with many common axle brands and configurations such as Dexter, AL-KO, Quality and both EZ-Lube and standard spindles; verify your bearing numbers (25580 inner, 14125A outer) before ordering.

How do I know this kit fits my trailer's axle?

Check the bearing numbers stamped on your existing inner and outer bearings or consult your axle/hub manual. This kit is specifically sized for tandem axles with 8-lug hubs and #42 spindles (1-3/4" x 1-1/4").

• Inner bearing: 25580 — included
• Outer bearing: 14125A — included
• Spindle size supported: 1-3/4" x 1-1/4" #42
• Hub lug pattern: 8-lug compatible

What components are included for a full hub rebuild?

The Tgkjmad kit contains all parts commonly needed to repack a hub and reinstall it correctly: bearings, races, grease seals, dust caps, spindle nuts and small hardware. Having everything in one kit prevents delays from missing parts during service.

• 25580 inner bearings and corresponding races
• 14125A outer bearings and corresponding races
• 10-10 (21333TB) and 10-36 (22333TB) double-lip grease seals
• Dust caps, spindle nuts, cotter pins, washers and rubber plugs

Why choose these bearings and double-lip seals for towing?

Precision alloy steel bearings deliver consistent rolling performance and load support under towing conditions, while properly sized double-lip NBR/steel seals help retain grease and block water and debris. Together they extend service intervals compared with worn or mismatched components.

• Alloy steel bearings for strength and fatigue resistance
• Double-lip seals reduce grease loss and contamination ingress
• Matched races ensure correct seating and preload
• Complete hardware simplifies proper torque and cotter-pin installation

How should I maintain hubs after installing this kit?

After installing and correctly adjusting bearing preload and spindle nut torque, inspect wheel ends periodically and repack with high-quality wheel bearing grease according to towing hours and exposure. Replace seals if they show damage or leakage signs.

• Repack bearings with marine or high-temperature wheel bearing grease
• Inspect seals and dust caps after heavy water exposure
• Retorque and check cotter pin security after initial break-in miles
• Follow axle manufacturer service intervals

Who is this for: The Tgkjmad Trailer Bearing Kit 7000 lb is intended for DIYers, fleet technicians and trailer owners who need a complete hub service solution for tandem-axle trailers rated around 6,000–7,000 pounds. It's best for trailers using 8-lug hubs with #42 spindles and for anyone replacing both inner 25580 and outer 14125A bearings at once to restore safe, smooth towing performance.