Parts Needed to Install Electric Brakes on a 5 X 8 Cargo Trailer

Updated 06/26/2017 | Published 06/24/2017

Products Featured in This Question

etrailer Electric Trailer Brakes - Self-Adjusting - 10" - Left/Right Hand Assemblies - 3.5K

(3184)

$163.80

10 Gauge Wire - Blue Primary - Per Foot

(108)

$1.65

Trailer Wiring Junction Box

(824)

$35.47

Ring Terminal - 12-10 Gauge Wire - 3/16" Ring ID

(71)

$1.17

Easy Grease Trailer Hub and Drum Assembly for 3.5K Axles - 10" - 5 on 4-1/2 - Pre-Greased

(1835)

$105.75

Provider ST205/75R15 Radial Trailer Tire w 15" White Mod Wheel - 5 on 4-1/2 - Load Range C

(1134)

$182.97

Question:

Hello, I would like help to make sure I have all the parts I need to add brakes to my new Interstate 5 X 8 cargo trailer. It has a 3500lb axle with a brake mounting flange attached. The wheels are 15inch with a 5 on 4.5 pattern. I also plan on ordering the brake module and install kit plus a spare tire. Here is what I have in my cart so far: TK90160 Tekonsha Primus IQ Trailer Brake Controller - 1 to 3 Axles - Proportional - TK90160 ETBC7 Universal Installation Kit for Trailer Brake Controller - 7-Way RV and 4-Way Flat - 10 Gauge Wires - ETBC7 AKHD-545-35-EZ-K Trailer Hub and Drum Assembly - 3,500-lb E-Z Lube Axles - 10inch Diameter - 5 on 4-1/2 - AKHD-545-35-EZ-K AC15R45WMQ Contender ST205/75R15 Radial Trailer Tire w/ 15inch White Mod Wheel - 5 on 4-1/2 - Load Range C - AC15R45WMQ H20044 7-Way Molded Trailer Wire Connector, 6foot Long - H20044 38656 Trailer Wiring Junction Box - 38656 AKEBRK-35-SA Electric Trailer Brake Kit - Self-Adjusting - 10inch - Left and Right Hand Assemblies - 3,500 lbs - AKEBRK-35-SA

asked by: Darin

Expert Reply:

To add brakes and the wiring to support their operation to your 5 x 8 cargo trailer you'll want to make sure the brakes have the correct rating for your axle (which you did) and also that they use the same mounting bolt pattern as your installed brake flanges. The brakes you referenced, left and right brake kit # AKEBRK-35-SA, use a 4-bolt flange pattern.

The hubs you referenced, # AKHD-545-35-EZ-K, will work with these brakes. Do note that these hubs are intended for axles with EZ-Lube spindles that have a grease zerk fitting on the end. They will also work on standard spindles.

Wiring the brakes will require a junction box like # 38656 as well as the 7-way trailer plug like # H20044. You will also need ring terminals # 44-5310A to make the connections and 10-gauge wire # 10-1-1 to run from the junction box to each brake assembly. Either brake wire can be ground or hot. You can refer to the linked article for more on adding electric brakes to a trailer; this will give you a complete recap of all the things to keep in mind and all the parts required.

The wheel/tire you referenced, Provider # TA47VR, will fit your selected hubs and is rated appropriately for the 3500-lb axle capacity.