How to Select Replacement 5-on-4-1/2 Trailer Hub
Updated 06/20/2016 | Published 06/17/2016
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Question:
Hello, I was wondering if you have a trailer hub that has a 1.5 inch inner grease seal and 1.25 inch bearings. It is a straight 1.25 inch shaft and is 5 on 4.5 inch hub. thanks.
asked by: Jim
Expert Reply:
Selecting a replacement trailer hub requires that you either match up the inner and outer bearing numbers, or take precise spindle measurements to the nearest thousandth (1.234) with a dial or digital caliper like # PTW80157. Matching the bearings is critical to ensuring that your new hub will fit properly on your spindles. The linked diagram shows a spindle and the positions where bearings will ride (C & D) and these are the points to measure if you cannot find the bearing part numbers.
The linked page displays all 5-on-4-1/2 hubs, including idler hubs (no brakes) and hub/drums for use with drum brakes.
Once you have your bearing numbers just click on the appropriate inner and outer bearing to see the hub items that use those same bearing.
A popular hub/drum for use on 3500-lb axles is part # AKHD-545-35-EZ-K which uses bearings # L68149 and # L44649.
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