In order to replace a trailer hub, you will need to know the bolt pattern. The majority of trailers have a 4, 5, or 6 bolt pattern.

The bolt pattern is a numbered description based on the amount of wheel studs in comparison to the distance between them. The distance is measured from any wheel stud to the area directly opposite the hub face. This measurement can also be discerned by measuring the stud spacing. See below illustration.

We hope this can be of great help! If you have any questions or concerns please call 800-300-4067.

5-Way Connectors: 5-Way connectors allow the basic hookup of the three lighting functions (running lights, turn signals, and brake lights) a pin for Ground, and also one additional pin is available to provide support for surge brakes or hydraulic brakes. The additional wire is tapped into the backup lights to disengage the hydraulic trailer coupler (actuator) when the vehicle is reversing, turning off the trailer's brakes.

To see our selection of 5 pin plugs, choose between Trailer End Wiring or Car End Wiring.

Are you new to the towing business or a first time installer? Not sure what a 4 pin flat is?

4-Way Connectors: 4-Way connectors allow the basic hookup of the three lighting functions- Running Lights, Turn signals, and Brake Lights and one pin is provided for the Ground wire

See our selection of 4 pin flat car end connectors. Any questions or concerns, please call us direct at 800-300-4067.

Not sure when you need a tailight converter? A tailight converter is required when the towing vehicle has seperate wires for brake lights and turn signals. The diagram below will help you choose the right converter.

Ever wondered how to differentiate a Two Wire and Three Wire System? You will have 5 wires on your vehicle side.

• GREEN - Right Turn
• RED  -Brake Signal
• YELLOW  -Left Turn
• BROWN - Running Lights
• WHITE - Ground

2 Wire Systems
Only use the combined Left and Right turn signals. The Brake signal and Turn signal are on the same wire.

3 Wire Systems
Only use the Right Turn signal, Brake signal, and Left Turn signal. You do not...

Did you know the most common trailer end plugs are 4 way, 5 way, 6 way and 7 way? This wiring information chart will show you how to determine each plug style and what it is used for. The color the column is highlighted in, is the color of the plug.

Not sure which is the correct plug style for your trailer? See our selection of trailer end wiring connectors while taking the following into consideration:

4-Way Connectors:
4-Way connectors allow the basic hookup of the three lighting functions (running lights, turn signals, and brake lights) and one pin is provided for the ground wire. 

5-Way Connectors:
5-Way connectors allow the basic hookup of the three lighting...