How to Determine the Size of a Trailer Hub Assembly for Replacement

Question

Question:

The axle nut appears to be 1 inch how do I know what size hub to buy ? its 5 lug and has 13 inch tires on it ?

asked by: John C

0

Expert Reply:

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 marked L44643, you will need # 8-258BTUC1. If you do not have the old bearings, you need to measure the inner bearing surface on the spindle to determine if the 1.063 inch dimension or 1.00 inch dimension will be needed to accept the bearing. You can also measure the inner seal mounting surface and those dimensions would be 1.5 inches and 1.249 inches respectively. I have provided links for these two products and this will help with dimensions and pictures. Remember to make sure the bolt pattern is the same. You can use the measurement guide for this at the bottom of either hub assembly page.

Here are the specific measurements for each hub.

Hub 8-258-5UC1
bearing # L44649
Inner bearing dimension is 1.063 inches
Inner seal dimension is 1.500 inches

Hub 8-258BTUC1
bearing #L44643
Inner bearing dimension is 1.00 inches
Inner seal dimension is 1.249 inches

expert reply by: Robert G

0

Joe F.

5/16/2020

I need to purchase two replacement hubs (hopefully pregreased) for a 1989 Coleman Shenandoah pop up camper (5 bolt wheel). Unfortunately, the camper is located in the mountains of Colorado over a 100 miles away from my residence and I cannot easily measure the size of the axle. Do you sell hubs what would fit the 1989 Coleman Shenandoah camper? If so, could you direct me to the specific parts. Thank you.

Reply

Chris R.

5/19/2020

I really wish we had access to part numbers used for trailers like this, but unfortunately lists/charts just aren't available. The only way to verify a good replacement will be to measure the spindle or look at the bearing numbers used in the existing hubs. I know this isn't the answer you were hoping for - I wish I could have given you a better one....

Reply

Answer 1

If you give me the tapered spindle measurements like in the attached photo, I can help you get the replacement hubs you need. I need the measurements at letter B where the seal sits, letter C where the inner bearing rides, and letter D where the…

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Answer 2

The #84 spindle is just a common way to identify the spindle dimensions typically used for 3,500 lb axles. So instead of listing out the parts, people can just say they have #84 spindles and it's easier to know what fits it. The CE Smith…

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Answer 3

The best way to determine which hub assembly you will need is by the bearing numbers. The item you selected, Trailer Hub Assembly, part #8-258-5UC1, is a replacement hub which uses Inner and Outer Bearing #L44649. The bearing numbers will be…

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Answer 4

From my research on your 2005 Karavan model BW-2350-74-st, you most likely have a 3500 pound axle on your boat trailer. For a great hub, I recommend the CE Smith Trailer Idler Hub Assembly w/ Case for 3.5K Axles - 5 on 4-1/2 #CE13515. This…

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Answer 5

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 6

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…

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Answer 7

The difference between an load range C and load range D tire in the same size is the capacity and psi rating. The two tires will still have the same dimensions and fit on the same wheel. The D rated tire has a higher capacity. For a ST175/80D13…

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Answer 8

To determine which hubs would be best for your boat trailer there are a few things you will need to look at; the axle capacity on your boat trailer, the inner bearing number, outer bearing number, grease seal number, the bolt pattern of your…

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Answer 9

Hey, thanks. You're not so bad yourself! Going to a larger tire size is possible but there are a few things to think about. Chief among these things is clearance. When going from an 8 inch tire to a 12 inch tire the diameter will increase by…

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Answer 10

The trailer will have a plate or sticker on it that will list 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 will list the weight capacity. You can…

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Answer 11

For a hub with bearings that fit a spindle with the dimensions you mentioned we have the Dexter Trailer Idler Hub #8-259-50. This does not come with a seal or bearings. You'd need #L44649 for bearings and #10-9 for seals.

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Answer 12

The Tandem-Axle Trailer Hanger Kit for Double Eye Springs #APT5 may have the correct equalizer but you will need to measure the current equalizer to find out. The length from the center of the left-most eye to the center of the right-most eye of…

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