The best 5200 lb axle bearing kit depends on your spindle and bearing numbers, not just the axle rating. For a D42 spindle using 25580 and 15123 bearings, the GREPSPUD and iBroPrat four-set kits include both common grease seal sizes. Racewill’s 25580/14125A kit covers a different bearing combination, while its LM67048 kit and the single-set option are for buyers whose existing parts match those numbers. Confirm your old bearings, races, seal dimensions, and spindle before ordering.
| Kit | Best For | Key Fitment Detail |
|---|---|---|
| GREPSPUD 4-set | Multiple D42 repairs | 25580 and 15123; two seal sizes |
| iBroPrat 4-set | Multiple D42 repairs | 25580 and 15123; two seal sizes |
| Racewill 25580/14125A | Matching bearing configuration | D42; stated 5200–7000 lb range |
| Single-set 25580/LM67048 | One repair with matching parts | Verify LM67048 outer bearing |
| Racewill LM67048 4-set | Several matching repairs | LM67048/LM67010 outer set |
GREPSPUD 4-Set 25580/15123 Kit
This kit is best for owners servicing multiple 5200–6000 lb trailers or keeping repair parts on hand, provided their axles use a D42 spindle and 25580/15123 bearing models. The package lists four each of the bearings, races, seals in two sizes, spindle nuts, washers, cotter pins, dust caps, and rubber plugs.
Its two included seal options have 2.125-inch and 2.250-inch inner diameters, both with a listed 3.376-inch outer diameter. That makes it a useful choice when the D42 seal size needs confirmation. Avoid this kit if your spindle is straight or your bearing numbers differ; the listing says it is not for a straight spindle.
iBroPrat 4-Set D42 Bearing Kit
The iBroPrat kit is best for buyers who need several repair sets for 5200–6000 lb tandem axles with a D42 spindle. It lists 25580 and 15123 bearings with their corresponding races, plus seals for both 2.125-inch and 2.250-inch inner diameters. The package also includes spindle nuts, washers, cotter pins, dust caps, and rubber plugs.
Choose it if those bearing numbers match your existing parts and you want multiple sets in one package. The listing specifies a 2.44-inch dust-cap outside diameter, which is worth checking against your hub. It is not a universal kit: confirm the spindle and bearing numbers before purchase.
Racewill 25580/14125A Four-Set Kit
This Racewill option is best for owners whose hubs require the listed 25580 and 14125A bearing combination. The listing describes fitment for D42 spindles on 5200–7000 lb tandem axles and notes extra dust caps, rubber plugs, spindle nuts, shims, and washers. It also describes alloy-steel components and double-lip grease seals.
Do not select it solely because your axle is rated for 5200 lb. Its bearing combination differs from the 25580/15123 kits above, so compare the numbers on your old bearings and races. The provided details do not specify all package quantities or seal dimensions.
Single-Set 25580/LM67048 Kit
This kit is best for a one-hub repair when the trailer has a 5200 lb axle, D42 spindle, and the exact 25580 inner and LM67048 outer bearing setup. It includes one of each bearing and race, a 22333TB seal, and a cotter pin. The listing gives the seal dimensions as 2.25-inch inner diameter and 3.376-inch outer diameter.
Choose this smaller package if you need one set rather than four. Its outer bearing is LM67048, not 15123, so avoid it if your existing hub uses 15123 or another outer bearing model. Check the race and seal requirements as well.
Racewill LM67048 Four-Set Kit
This Racewill kit is best for multiple repairs when the required inner bearing is 25580 and the outer bearing is LM67048. It lists four inner and outer bearings with matching races, two seal sizes, dust caps, rubber plugs, spindle nuts, cotter pins, and washers. The listing states fitment for 5200–6000 lb tandem axles with 1.25- to 1.75-inch dimensions.
It offers more repair sets than the single-set option, but its outer bearing differs from a 25580/15123 setup. Confirm that LM67048 and LM67010 match your hub before ordering.
Buying Guide: How to Choose a 5200 Lb Axle Bearing Kit
Which bearing numbers should you match?
Use the numbers stamped on the existing bearings as a starting point. These products do not all use the same outer bearing: some list 15123, while others list LM67048. Match the bearings and races to your hub and spindle rather than choosing by axle capacity alone. If markings are unreadable, consult the trailer or hub manufacturer with the relevant dimensions.
How do you verify the grease seal?
Check the seal’s inner and outer diameters against the spindle and hub requirements. The two four-set D42 kits list seals with 2.125-inch and 2.250-inch inner diameters. The single-set kit lists a 2.250-inch inner diameter and 3.376-inch outer diameter. Do not assume that a seal fits just because the bearing set does.
Do you need one set or several?
A single-set kit may suit one hub repair when its parts match. Four-set kits are better for servicing multiple hubs or keeping spares, but they include components you may not need for an immediate repair. Compare the included bearing, race, seal, and hardware quantities before choosing.
What else should you check before ordering?
Confirm the spindle type, bearing models, race models, and dust-cap dimensions. The GREPSPUD listing specifically excludes straight spindles, and several options identify D42 fitment. A 5200 lb rating by itself does not establish compatibility.
Frequently Asked Questions
Are all 5200 lb axle bearing kits interchangeable?
No. Bearing numbers, spindle type, races, and seal dimensions must match. The products here include different outer-bearing models.
What does D42 mean in these listings?
D42 is the spindle type named in the product fitment details. Confirm that your trailer has that spindle before selecting a D42 kit.
Can I use an LM67048 kit if my bearing is 15123?
Do not assume they are interchangeable. Match the bearing model required by your hub or verify fitment with its manufacturer.
Why do some kits include two grease seal sizes?
The GREPSPUD and iBroPrat listings provide seals with two inner diameters for D42 applications. Measure or verify which size your setup requires.
Should I replace the races with the bearings?
These kits include matching races, but the product details do not establish a repair procedure. Confirm the correct parts and replacement approach for your hub.