Bearing Kit that Fits Dexter 5,100 lb Axle

Question

Question:

I just purchased a 22 trailer and I would like to have a spare set of bearings. The Dexter label on the axle is 50439911-5100 pound. Axle

asked by: Ronald T

0

Expert Reply:

Hey Ronald, thanks for all of that info, based on that the correct bearing kit would be the part # BK3-310 that you referenced.

expert reply by: Jameson C

0

Jameson C.

2/3/2026

Hey Ronald, how did the bearing kit end up working with your 5,100‑pound Dexter axle? Knowing how it fit could help others looking for the right spare set for their trailers.

Answer 1

Hey Philip! Can you get the serial number off of that axle tag? We have two different bearing kits that will work with the difference being the grease seal. If your existing grease seal has a 2.25" inner diameter (ID) you can use the #BK3-300…

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Answer 2

Hey Don, thanks for reaching out! You either need the Bearing Kit #BK3-310 (2.125" grease seal ID) or the Bearing Kit #BK3-300 (2.25" grease seal ID). The part number on your axles unfortunately doesn't give me the info I need to reach…

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Answer 3

The standard 5,200 lb axle will use either the Bearing Kit #BK3-310 which has a grease seal ID of 2.125" or the Bearing Kit #BK3-300 which has a grease seal ID of 2.25". The bearing numbers are the same for each kit (25580 inner and LM67048…

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Answer 4

Hi Craig; thank you for providing those part numbers. That is the 2.25" inner diameter grease seal so for replacement bearings you can use the Bearing Kit, LM67048/25580 Bearings, 10-36 Seal #BK3-300 you were looking at. If you prefer Timken…

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Answer 5

Assuming that your hubs use the LM67048 outer and 25580 inner bearings, you will need the #BK3-300 which uses the 10-36 double lip grease seal with a 2.25 inch inside diameter. The BK3-310 uses a seal with a 2.125 inch inside diameter, which would…

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Answer 6

I'm assuming you're speaking of a bearing kit like #BK3-310 that includes a LM67048 outer bearing, a 25580 inner bearing and a GS-2125DL double lip seal. The seal fits a 3.376 hub bore and a spindle surface just a bit larger than 2.125…

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Answer 7

There are two possible bearing kits for your trailer's 5,200 lb axles. There's the more common part #BK3-310 and the less common part #BK3-300. The difference is the seal size. The part #BK3-300 has a seal with an inner diameter of 2.25 inch…

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Answer 8

Given the inner and outer bearing numbers you kindly provided (thanks for that!), you have a 5200 lb axle. We offer two different bearing kits that could work for you. Both include the replacement inner and outer bearings, the compatible races and…

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Answer 9

In order to determine the torque rating for the lug nuts on your trailer you will need to know check out the chart I attached that shows all of the torque specs for all the trailer lugs available based on stud size, wheel material and wheel size.

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Answer 10

The difference between the Class II and Class III hitches has to do with their Gross Trailer Weight (GTW), their Tongue Weight (TW), and their Hitch Receiver Size. Class II trailer hitch receivers have a 1-1/4 inch receiver and can be rated up to…

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Answer 11

Hey Bryan, that's a good question. The pricing can definitely be misleading, but I wouldn't use it to judge the quality of the tire. A lot of that comes down to promotions, inventory, and whether you're looking at a tire by itself or…

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Answer 12

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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Bearing Kit that Fits Dexter 5,100 lb Axle

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