Can Harbor Freight Haulmaster Hub Be Replaced with Standard Hub

Updated 09/03/2024 | Published 09/02/2024

Question:

Is it possible to replace the hub assembly on my harbor freight haulmaster 1720lb trailer with some industry standard components? I have had endless problems getting the bearings tensioned and 1 hub likes to lose Bearing Buddies unless they are glued in.

asked by: Dan W

Expert Reply:

Hey Dan, thanks for reaching out!

I can help you get some standard parts on your Harbor Freight Haulmaster, but we'll likely have to get you new spindles or a new axle for that. The spindle on a trailer is what determines the correct bearings so if your current setup doesn't use standard bearings then there isn't a way to "force" standard parts to work.

What bearings and grease seal does your trailer currently use, and what are the hub center and spring seat dimensions of your axle? I'm attaching a photo showing where to find those measurements.

expert reply by: Jon G

Hub Face and Spring Seat Dimnsions for Trailer Axle
(click to enlarge)

Dan W.

9/2/2024

Jon, Also worth mentioning that I am using the Provider 175/80R13 wheels on this trailer. I had to add about 1cm of spacer on each side. Thanks, Dan

Dan W.

9/2/2024

The hub face to hub face is about 56 1/2 to 57 inches Spring seat to spring seat is 47 inches The bearing is 25mm ID The dust seal says 30 52 10 on it Xike 30205 bearing kit is installed now and appears to be identical in size to the HF bearings (which are also marked 30205) Thanks!

Jon G.

9/3/2024

@DanW We have some options that are close, but unfortunately we don't have any bearing kits or axles that will be a direct replacement for what you have. For your application the only alternative we have is something like the 2K Timbren Axle-Less System # A20RS545 which bolts to the trailer frame and uses rubber springs as opposed to the traditional leaf spring suspension.