How Can I Tell If I Need 7K or 7.5K or 8K ABS Brakes For Horse Trailer Axle With Anti Lock Brakes?

Published 10/28/2025

Products Featured in This Question

Dexter Electric Trailer Brake for Dexter ABS Tow Assist - 12-1/4" - Left/Right Hand - 8K

(1)

$969.85

Dexter Electric Trailer Brake for Dexter ABS Tow Assist - 12-1/4" - Left/Right Hand - 7.5K

(1)

$899.98

Dexter Nev-R-Adjust Electric Trailer Brake for Dexter ABS Tow Assist - 12" - Left Hand - 7K

(1)

$192.07

Dexter Nev-R-Adjust Electric Trailer Brake for Dexter ABS Tow Assist - 12" - Right Hand - 7K

$185.57

Question:

I have Dexter Tow Assist on my horse trailer. How can I tell if I need the 7.5K or 8K brakes when ordering replacements?

asked by: Heather

Expert Reply:

Heather, most horse trailers in that weight range run 7K, 7.5K or 8K axles, depending on the model year. The easiest way to tell which you have is by checking the axle tube or bearing combination:

A 3" tube with a 14125A outer bearing usually indicates a 7K axle. If this size the correct ABS brakes are Left # DX69WR and Right # DX79WR.

A 3" tube with a different drum depth (12-1/4") means you’ve got the 7.5K axle, with the correct ABS brake assemblies being # DX23WR.

A 3-1/2" tube using 25580 bearings inside and out would be an 8K axle, which fits the Dexter ABS brakes # DX55WR.

The 7.5K and 8K assemblies look similar but aren’t interchangeable - the 8K has a deeper 3-3/8" shoe.