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Recommended Replacement Wheel Bearings On An Airstream Trailer  

Question:

I am replacing the wheel bearings on an Airstream trailer the number on the back bearing is 4T-25580 is that the same as the 25580 bearing in you product line?

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Expert Reply:

Yes, the Replacement Trailer Hub Bearing, # 25580, is the replacement for the Airstream trailer bearing 4T-25580. It has an inner diameter of 1.750 inches and has the same outer diameter as well.

If the (back)INNER bearing is the 4T-25580, then there are 3 different common outer bearing combinations. If you have a 6,000 lb axle, the outer bearing will be # 15123 and grease seal # RG06-070 will be needed as well. The bearing kit that includes these 3 parts is # BK3-100.

If you have a 5200 lb axle, the outer bearing is the # LM67048. For the bearing kit with both bearings and grease seal, use # BK3-310.

If you have a 7000 lb axle, the outer bearing is the # 14125A. For the bearing kit with both bearings and the grease seal, use # BK3-200.

It is important to choose the correct outer bearing and finding the bearing number is the easiest way because all three of these have the same inner diameter, but they each use a different race.

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Jason S
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