Parts Needed To Add Brakes To Single Axle Boat Trailer

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Question:

I have a single axel Eagle boat trailer. I would like to add electric brakes to it. Can you advise on what I need . Thanks

asked by: Steven S

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Expert Reply:

Hey Steven, thanks for reaching out. It may be possible to add brakes to your trailer. The first thing you will want to verify is that your axle has a brake flange. It should look something like part # 4-35. If no brake flange is present, they can be welded on by a shop, or you can replace the axle entirely.

If you do have a brake flange, this means brakes can be added. From there I will need to gather a bit of info from you. I will need to know the weight capacity of your axle, as that will help us choose the correct brakes. most commonly for single axle trailers we see the 3.5K brakes like part # AKEBRK-35-SA which are 10" x 2-1/4" shoes.

I will also need to know your spindle size/bearing sizes to determine the correct hubs. Knowing the weight capacity does help to narrow this down, but your best option here will be to pull one of your hubs and remove the bearings. Each bearing will have a number stamped on the edge, or you can measure the ID with a micrometer. Once we know that info we will be able to pair together the correct brake assembly and hubs for your trailer. If your axle does happen to be the 3.5K capacity like I mentioned above, you would use the # AKHD-545-35-EZ-K hub which is standard for 3.5K axles. It uses the # L68149 (1.378" inner diameter) inner bearing and # L44649 (1.063" inner diameter) outer bearing. Please check your hubs to confirm your baring sizes.

Once we have your brakes and hubs down, you will just need a 7-way wiring harness like part # e99011 plus additional wire for your lights and brakes. You will also need an emergency breakaway kit like part # 3802308, as well as an electric trailer brake controller for your tow vehicle.

If you want to confirm your axle capacity and bearing sizes for me I am happy to confirm fitment for those parts. I have linked an article for you below that goes over how to add electric brakes to a trailer in more detail. Comment below with that info or if you have any questions on any of this. Cheers!

expert reply by: Jesse M

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Answer 1

Hello Mike. It sounds like you are wanting to add electric brakes to your boat trailer that currently has no brakes. This is possible, but you will first need to make sure that your axle is equipped with a brake flange at the base of the spindle. The…

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Answer 2

Traditionally, trailer manufacturers did not use electric brakes on boat trailers because the brake magnet wiring and trailer wiring did not always have the best insulation or water protection. These days, more and more manufacturers are using…

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Answer 3

Adding a brake controller to your 2013 Nissan Frontier that already has a working 4-pole flat trailer connector is a simple process that requires only two parts. First you will need a brake controller installation kit, part #ETBC7. This kit includes…

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Answer 4

The difference between the Class II and Class III hitches has to do with their Gross Trailer Weight (GTW), their Tongue Weight (TW), and their Hitch Receiver Size. Class II trailer hitch receivers have a 1-1/4 inch receiver and can be rated up to…

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Answer 5

Yes, the tire size 205/75-14 that you referenced can fit on 6 inch wide wheels. That size can fit the following widths: 5", 5-1/2", 6", and 6-1/2".

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Answer 6

A 4-Way trailer connector has the basic lighting functions only; running lights, left turn signal and brake lights, right turn signal and brake lights, and ground. A 7-Way has these functions and a 12 volt circuit, a circuit for electric trailer…

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Answer 7

Hey Steven, thanks for reaching out. It may be possible to add brakes to your trailer. The first thing you will want to verify is that your axle has a brake flange. It should look something like part #4-35. If no brake flange is present, they can be…

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Answer 8

For your 2024 Nissan Frontier I recommend the Redarc Tow-Pro Liberty Brake Controller #RED24FR. I like the Liberty because it is simple, reliable, and looks great in any vehicle. The main unit installs behind the dash, so only the control knob will…

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Answer 9

In order to determine the torque rating for the lug nuts on your trailer you will need to know check out the chart I attached that shows all of the torque specs for all the trailer lugs available based on stud size, wheel material and wheel size.

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Answer 10

The trailer brakes work on a separate circuit than the lights. You have a couple of options to control the electric brakes on the trailer. One option is to use an air over electric brake control, #HA100400C. This unit connects to the air brakes on…

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Answer 11

It sounds like you are speaking of the wires for the brake magnets. If this is correct, you will need to connect one of the wires to the brake controller output wire on your trailer connector and the other wire will need to be grounded to a clean…

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Answer 12

The best brake controller option to go with is one that activates the brakes proportionally instead of time delayed. A proportional brake controller will activate the trailer brakes at the same time and with the same intensity as the tow vehicle…

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Parts Needed To Add Brakes To Single Axle Boat Trailer

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