Where to Measure on Trailer Spindles to Determine Replacement Hubs

Question

Question:

Can you tell me where I should take the measurements on the spindle to determine what hubs I need.It is a 3500lb trailer axle. I want to replace the 2 hubs. The inner bearing is L68149 and the outer is LM12749. These bearings are from a brake rotor on the trailer even though the trailer doesnt have brakes, thus the reason why I want to switch over to hubs. Thanks for your help.

asked by: Denis

0

Expert Reply:

You will need to measure the diameter of the spindles where the seal and bearings ride. Check out the picture I attached that shows where this is. You will need an exact measurement so either a digital or dial caliper will be needed.

To pick out the correct hubs you will also need to determine the bolt pattern of the hubs you currently have so that the new ones will be compatible with your current hubs. I attached an FAQ on how to determine this.

If you get back to me with that information I will help you pick out the right hub assemblies. Or, you can follow the link I attached that will take you to the page that has all of our replacement hubs.

You would want to first select the bolt pattern that you have, next select the inner bearing you have, followed by selecting your outer bearing, and then all the correct hubs will be listed.

expert reply by: Jameson C

0

click to enlarge

Scott

2/19/2024

Is there away I can you call?my name is Scott a I have a hub issue that I need to explain it to an expert. 7065805974

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Jameson C.

2/20/2024

@Scott I don't have a phone at my desk but if you can type your question out here I would be more than happy to help.

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Eric H.

5/6/2024

Is there another picture to go with this illustration? What’re the locations/names of the letters referenced above?

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Jameson C.

5/6/2024

@EricH All of the relevant letters in that picture are labelled?

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Eric H.

5/7/2024

@JamesonC the last two are not

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Jameson C.

5/7/2024

@EricH E is diameter of spindle where threads are, A is diameter of spindle that inserts into the axle, and F is length of spindle where it installs into axle and gets welded. For the purpose of picking out replacement components though those dimensions aren't really needed.

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Matt M.

6/26/2024

Hello, Would you be able to help me select the correct hub for my trailer? old wheel size: R15 Stud pattern: 5 on 4.5" Spindle Grease seal diameter: 1.63" (1" 5/8) or 4.1cm spindle inner race diameter: 1.25" or 3.2cm Sindle outer race diameter: .75" or 1.9cm And could you help with the correct bearing sizes? - My old bearings I pulled off my trailer: outer bearing- #09067 Tyson, inner bearing- #15123 Tyson Thank you for your time! Matt

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Jameson C.

6/26/2024

@MattM I really wish we could help but we don't have anything that matches the 09067 bearing as that's pretty old and not a current standard. Typically in these situations only option is a new axle.

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Answer 1

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 Trailer…

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Answer 2

Hey Joe, to pick out the correct parts needed to convert your trailer to either brake style will require knowing the axle capacity as well as the wheel bolt pattern. That's basically all that's needed. Since you have the bearing numbers…

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Answer 3

I do have one hub that uses a .75" ( #LM11949) outer and a 1.25" ( #LM67048) inner bearing. This bearing combination is uncommon these days, but we have the hub #DX22XR. This is a 5 on 4-1/2" idler hub for a 2,500 lb axle. Bearings,…

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Answer 4

Hey Steven, you generally do not need to replace the wheel studs of your hubs when installing slip on disc kits like the DeeMax part #DE72FR. The rotors are not overly thick and normally trailer hub wheel studs are longer than needed so it's not…

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Answer 5

I have included a picture that shows the measurements needed for a spindle, bearings, seals, faces, and hubs. The spindle measurements are labeled A through F. A is the spindle shaft diameter B is where the grease seal sits C is where the inner…

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Answer 6

The BTR and BT8 denotations refer to the spindle, not the trailer hub. The difference between a BTR and BT8 spindle is that the BTR spindle uses a 1.063" diameter L44649 bearing and the BT8 spindle uses a 0.99" diameter L44643 bearing. In…

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Answer 7

Overpacking the trailer hub with grease is the number one reason for grease seal failure. For a boat trailer I would recommend re-packing the hubs by hand with grease once per season and you'd be fine. I don't like recommending people use…

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Answer 8

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 9

Based on the information you provided either the Titan Hydraulic Brake Kit - Free Backing - 10" - Left and Right Hand Assemblies - 3,750 lbs #T4071600-500 or #T4423500-400 will fit your drums. The only difference between these two brakes is the…

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Answer 10

Assuming your tires are in good shape without any bulges the easiest way to determine if you have a bent spindle is to take a straight edge that is longer than the tire and lay it across the tire parallel with your trailer frame and then measure the…

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Answer 11

The #99 trailer spindle is typically found on 9,000 lb and 10,000 lb axles. This is not a spindle that we carry at this time, but I did find some of the measurements. I have attached a diagram showing the dimensions of a #99 spindle for you to check…

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Answer 12

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…

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