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How to Determine Correct Fit of Replacement Hub on Trailer Spindles  

Question:

I am looking for a hub assembly 5 on 5.5, .75 outer,1.25 inner. Can you help Thanks

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Expert Reply:

Our range of 5-on-5-1/2 hubs for 2000-lb to 3500-lb axles is shown on the linked page. These items include both idler hubs like # AKIHUB-555-35-K for trailers without brakes and also hub/drums like # AKHD-555-35-K for trailers with drum brakes. All hubs include bearings, races, seals and lug nuts.

As it happens, all of these 5-on-5-1/2 hubs use the same set of bearings, inner bearing # L68149 and outer bearing # L44649.

A new hub has to use the same bearings as the one it replaces in order for it to fit properly on the trailer's spindles. Matching up the old/new hub bearings is the easiest way to confirm a good fit but it is also possible to measure the spindles where the bearings ride to get their inner diameters. Please refer to the linked diagram.

Bearing # L68149 has an inner diameter of 1.378-inches and bearing # L44649 has an inner diameter of 1.063-inches. If the dimensions you provided (0.75 and 1.25) are your two bearings' inner diameters then we do not have a hub to fit your spindles.

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Adam R
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Trailer Hubs and Drums 5 on 5-1/2 Inch
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