How to Determine Replacement Trailer Wheel Bearing Sizes

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Question:

Are all trailer wheel bearings the same size? Like the one you sell, fits all

asked by: Dave B

0

Expert Reply:

Trailer wheel bearings are specific to the spindle that is installed on the axle that is on your trailer.

You will need to safely support the trailer, remove the wheel and tire, remove the grease cap, remove the cotter pin and washer that secures the spindle nut, remove the spindle nut, and then you will be able to remove the hub from your trailer.

Once the hub is removed you will be able to get the part numbers from the inner and outer bearings to determine the correct replacement parts for your spindles.

I have attached a photo of the parts showing where the part numbers are located and the areas that you will need to measure if your parts do not have part numbers etched on them.

expert reply by: Robert G

0

click to enlarge

Paul R.

4/19/2013

I bought a trailer that was home made and needed to replace the inner and outer bearings and seal this answer and Photo works really good made it a lot easier to get the right replacement parts that I needed THANK YOU !!!!!!

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Patrick B.

4/25/2013

We are glad to hear our site information is helpful. Let us know if you have any questions.

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Ashley

9/16/2020

This is the most helpful information I’ve come across! Thank you! Changing my first ever bearings on our old ‘75 livestock trailer.

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Jon G.

9/16/2020

@Ashley Thank you for the kind words! Glad we could help out!

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Johnny K.

4/26/2020

Have a trailer with inner bearing #68149 and outer bearing of #67048 probably old mobile home axles ,I bought some hubs from yall AKHD-655-6-K outer bearing was the same but inner bearing was way to large . Need to see if you have anything compatible so I can send hubs back for exchange

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Chris R.

4/27/2020

We don't have any hub assemblies available that use that inner and outer bearing combination. The trouble with mobile home axles is that they're really only designed to be used once - so they often require unique hub assemblies and replacement parts are really hard to come by. I know it's probably not what you're hoping to hear, but your best option is likely a whole new axle that features a standard spindle. If you can tell me the hub length on your current unit along with its capacity, I would be happy to make a specific recommendation.

Helpful Links

dept-pg-trailer_axles.aspx

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Craig J.

5/19/2020

Hello I have a 91 yacht club boat trailer, it hauls a 17' searay fishing boat. I'm looking for bearings and seals for it, can u help me?

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Chris R.

5/21/2020

In order to determine the right replacements you'll need to pull one of your existing hubs and check for the bearings that are used. There should be a number stamped right inside both the inner and outer bearings - if you can tell me these numbers I would be happy to recommend the right parts.

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Frys

7/7/2020

Need seals and I think there double seals on a loadrite boat trailer. L68149 UCF-6 inner bearing, L44649 outside bearing. Could not locate numbers on seals. Also need break shoes and hardware for loadrite trailer 10 inch brake drums. Can you advise on the correct parts? Thanks look forward to hearing from you.

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Chris R.

7/12/2020

With that inner and outer bearing, there's a really good chance you have a 10-19 seal. For a double lip seal the part # RG06-050 will work perfectly. If you have a 3,500 pound axle with electric brakes the etrailer Replacement Shoe # AKBRKR-S-10 should work well.

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Roger B.

7/12/2020

I have a 1958 boat trailer. Bearing size

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Chris R.

7/12/2020

Unfortunately there's no way for me to know what bearing size the hub on your 1958 boat trailer uses. You will need to pull one of the existing hubs and check for a number stamped inside the bearings themselves or measure along the spindle where they sit to get their inner diameters.

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Cole K.

8/19/2022

@ChrisR You are so patient.

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Answer 1

To determine the size of the hub assembly you need to purchase you have to determine which bearings are in the old assembly. If the old assembly has L44649 inner bearings, you would use the hub you chose #8-258-5UC1. If the inner bearings are…

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Answer 2

The spindle dimensions are as follows: A is the mounting dimension, B is the seal dimension, C is the inner bearing surface, D is the outer bearing surface and E is the diameter of the threaded portion of the spindle for spindle nut selection. Say…

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Answer 3

There is a couple of way to determine which wheel bearings and grease seals you will be needed for a trailer axle. First, checking the numbers on the wheel bearings and seal will allow you to select the correct parts for your axle. However, in some…

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Answer 4

We recommended to repack the wheel bearings on your trailer every 12 months or 12,000 miles. There is not a specific guideline as far as actually replacing the bearings. When repacking them with grease, you will also just want to check for any…

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Answer 5

A BT8 spindle would have a diameter of .99 of an inch where the bearings would both install and would have a diameter of 1.24 where the great seal would ride. That would require a hub part #AKIHUB-440-2-1K for an idler hub. A BTR spindle would have…

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Answer 6

Based on the information I can find on your Dexter 8-243 hub it appears it is for a 3500lb axle and uses standard 3500lb bearings which are inner bearing #L68149 and outer bearing #L44649 but I recommend confirming this first. You can confirm your…

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Answer 7

Even though I cannot comment specifically on the grease you used because I am not familiar with it, I can tell you the best grease for trailer bearings is a a grease with a rating of GC-LB, which just means it is made to withstand very high…

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Answer 8

Hi Bud, The Kenda Karrier ST175/80R13 Radial Trailer Tire with 13&quot; Black Mod Wheel #AM31990 does not come balanced, though you can easily do so with the Counteract Tire Balancing Beads Single Pack for Trailers #CA66VR. These beads…

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Answer 9

The bearing part #L44649 has an inner diameter of 1.063 and is typically used in 3,500 lb axle hubs and the #L44643 has an inner diameter of 1 inch and is typically used on 2,000 lb axle hubs. If you can get me more info on your trailer like axle…

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Answer 10

To determine the size of the brake assemblies you need you have to measure the depth and width of the hub drum on the axle like what you see in the picture I attached. The most common size is 2-1/4 inch wide like the #T4071600-500 that you…

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Answer 11

To find the load capacity for your axle you should look on the trailer VIN plate or sticker that lists the VIN number. The weight rating of the axle should be listed on that same plate or sticker. Also, the axle could have a tag or plate on it that…

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Answer 12

You can measure either the outer diameter of the part of the dust cap that fits into the hub OR the inner diameter of the hub where the dust cap goes using calipers such as #PTW80157. Calipers are needed because the measurement has to be as…

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How to Determine Replacement Trailer Wheel Bearing Sizes

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