How To Tell If I Have ABS System On My Trailer From Lippert

Published 08/25/2025

Products Featured in This Question

Trailer Hub and Drum Assembly for Lippert ABS System - 5.2K - 7K Axles - 12-15/16" - 8 on 6-1/2

(8)

$131.37

Trailer Hub and Drum Assembly for Lippert ABS System - 7K Axles - 12" - 8 on 6-1/2

(8)

$150.71

Electric Trailer Brake Assembly for Lippert ABS Hubs - 12" - Left/Right Hand - 5.2K - 7K

(6)

$221.32

Question:

How can I tell if I have the LC47PX or LC49PX hubs already on my trailer? or the abs system in general

asked by: Jayden

Expert Reply:

Great catch, Jayden, here’s how to tell:

# LC27PX uses 1/2inch wheel studs for 5.2K - 7K axles
# LC49PX uses 9/16inch studs heavier-duty for 7K axles.
Both are 8 on 6-1/2inch bolt pattern with ABS sensor ring built-in.

You can measure the stud diameter with a simple caliper or socket, or check your axle tag if it’s still legible. The # LC49PX is usually found on heavier-duty builds like toy haulers or goosenecks, while # LC27PX is common on standard 5th wheels.

Both of these are compatible with Lippert Electric 12" Brakes For ABS system # LC83PX. This has extra holes pre-drilled for the ABS sensors that connect to the ABS module, and not just 2 wires for the electric brakes.

Keep in mind, another way to check if you have the Anti Lock Braking system from Lippert is to check under the trailer for wiring going to an ABS Module (only available through Lippert at this time).