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12-1/4 x 3-3/8 Inch Electric Trailer Brakes for 9K and 10K Trailer Axles  

Question:

Hi, I have a 97 gooseneck with P-12 SL axles. The outer bearing number is 25580. The hub number is 9-44. I know the brake assembly is a manual adjust and should be 12 1/4 x 3 3/8, but how do I know which assembly do I need?

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Expert Reply:

There are 2 different sets of 12-1/4 x 3-3/8 inch brake assemblies and the difference between them is the mounting patterns they have.

Electric brakes # 23-450 and # 23-451 will bolt to either a 5-hole or 7-hole mounting flange and they are for 9K to 10K axles which is what the hub # 9-44-1 is for.

Electric brakes # 23-434 and # 23-435 will bolt to a 4-hole flange and they are for 8K axles.

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Michael H
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Dexter Axle Trailer Brakes 23-450 Review - Video
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