Tag Archives: trailer wheel hubs

Get the right trailer hub for your trailer

What trailer hub do I need to purchase?

This is a question that comes up quite often in Champion’s business.  Some people may trouble in determining what trailer hub to purchase.  Just follow the easy steps below and you will get the hub you need for your trailer.

The first thing in moving forward with purchasing a trailer hub is to determine which hub you need to order for your trailer. Getting the correct hub for your trailer is easier than you think. The easiest way to make sure you are getting the correct hub it to remove it from the trailer. Next you will remove the front and rear bearings and seal (without damage). Once you remove the bearings you will be able to read a number off the back of the bearing or measure the inside dimension of the bearing.  Call Champion with this information and we can get the right hub for your application.

Step 1. The numbers on the back of a trailer bearing correspond to a certain spindle size, and this is the easiest way to determine the correct hub. If a number is not legible on the bearing then you will need a micrometer to measure the inside dimension of the bearing.

Step 2.   Determine the correct seal. This is an important part as well since the seal is what helps to keep the grease inside of the trailer hub. Some seals have numbers stamped for easy cross reference, and others require taking measurement. If you have to measure the seal then you will measure the inside and the outside diameter. There can be between one to three seals that work for certain bearing combinations which is why only using the inside or the outside dimension is not recommended. Most trailers will use a standard double lip seal if they are using a grease application, and those using oil will need a triple lip seal or even a unitized oil seal.

Step 3. Check to see how many studs are on your hub. Trailer hubs come with 4, 5, 6, and 8 studs depending upon the capacity of the trailer axle. If you have a hub that has 5 studs then there is a little more work to, so move to Step 4. If you have 4, 6, or 8 studs your work is done and you should be able to purchase the correct hub!

Step 4. Check your bolt pattern.



How to Correctly Pre-Load New Trailer Hubs

Whenever you install new hubs or new bearings and races into an old hub, you should pre-load the trailer bearings.  It is very important that this is done to avoid catastrophic damage to the hub or trailer.  When a hub is not preloaded the races are not seated properly in their machined stop points in the hub. This will allow the trailer hub to move around on the spindle after a few miles and scar the spindle and/or the hub may even come off the trailer completely.

To help with the pre-loading procedure for new trailer hubs or newly installed trailer races Champion Trailers has provided a “How To” for the everyday trailer owner to follow.

Please feel free to contact our technical department at 1.800.229.6690 or generalsales@championtrailers.com if you have and questions or concerns. 

Pre-Loading Trailer Hub and Bearings 101

Step 1:  To pre-load the trailer hub, install the spindle washer and spindle nut onto the spindle with the hub and bearings in place after the trailer hub has been packed with grease.

Step 2:  Tighten the spindle nut finger tight (until snug) and then with channel-lock pliers or a crescent wrench, tighten the spindle nut another 1/4 turn or about 15 to 20 ft pounds of torque.

Step 3:  Now turn the hub ten to 15 revolutions. This will fully seat the races to their machined stop points in the trailer hub

Step 4:  Now loosen the spindle nut very loose, and then re-snug to finger tight, and engage the nut retaining device (some reverse lubricating spindles use a tab washer for the retaining device).


Be aware that the nut retaining device (tang washer, tab lock washer, or cotter pin) are a one time use device.  Never reuse these items!  All retaining devices can be purchased at http://www.championtrailers.com/trailer-spindle-accessories/

* Champion Trailers will not be held liable for incorrect preloading or installed trailer races or hubs*