Replacement Hub Kit That Uses Outer Bearing with 1.25" and Inner Bearing with 1.378" Inner Diameters

Updated 11/03/2025 | Published 01/15/2025

Question:

i have measurements on my spindles. i need 2 idler and 2 drum replacement hubs. can you tell me which ones? unknown at threads, outer 1.25, inner 1.378, seal unknown

asked by: Terry D

Expert Reply:

Hey Terry, thanks for reaching out and providing all of the information!

The only kit we have that matches with those bearings is the Trailer Hub and Drum Assembly # 8-407-5UC3-EZ. This is specifically a fit for 4.4K axles so if you have a different weight capacity, we'll need to check your axle tag with the manufacturer to make sure we get you setup with the correct parts.

Since there aren't any idler hubs for this setup, you'll either need to switch them all to a brake system, or you can check out the linked Local Installer tool to find shops we work with in your area that can reach out to the manufacturer to put in a specific order for you.

Sometimes getting replacement parts can be confusing, so if you send me a photo of the axle tag (located in the middle of your axle) or at least let me know the info on it I'd be more than happy to reach out to the manufacturer to see how we can get your trailer back up and running.

expert reply by: Jon G

Jon G.

11/3/2025

Hey Terry, what did you find out after checking the axle tag for your trailer? Once you confirmed the weight rating, were you able to match up the right hubs for your setup? Your update could make it easier for others trying to replace similar parts.