How to Select Correct Replacement Idler Hubs for Trailer

Updated 03/08/2017 | Published 03/07/2017

Question:

ok... I have a trailer im trying to switch out my trailer axel hubs from the utility wide 5 lug hubs to the 6 on 5.5 hubs AKIHUB-655-6-EZ-K or AKIHUB-655-6-K..the bearing sizes ID 1.25 outer bearing and 1.75 ID inner bearing match the bearings for these replacement hubs, just didnt know if this spindle the design of it will work or if its to long, or , the beveled area is to short etc..the original hub did not have drum brakes it was just free spinning hub..any help would be greatfull,got this trailer cheap and just want to get it street legal and safe..thanks...

asked by: James B

Helpful Expert Reply:

When substituting new hubs you need to match several things: the axle capacity, the wheel bolt pattern and the bearing set used inside the hub. Bearing dimensions can be used instead of the bearing part numbers but the part numbers are the best way to ensure the new hub will fit properly on your spindles. Matching the inner and outer bearing numbers ensures compatibility. You can also measure your current hubs' outside-to-inside depth (the distance from the outer bore where a grease cap installs to the inner bore where the grease seal goes).

For an application without brakes, meaning idler hubs rather than hub/drum assemblies, you can use the linked page that will display all idler hubs. You can select your axle rating and preferred wheel bolt pattern by clicking on the appropriate filters. We offer 6-on-5-1/2 hubs for 3500-lb, 5200-lb and 600-lb axles.

For instance, part # AKIHUB-655-6-K is a 6-on-5-1/2 idler hub rated for 6K axles that uses (and includes) inner bearing 25580 and outer bearing 15123.

expert reply by: Adam R