Measuring Bolt Pattern To Determine Which Electric Brake Assembly to Use

Question

Question:

Im looking to add electric brakes to my utility trailer. Measuring the wheel lugs, they look like about 5 x 4 7/8 inch . There is nothing stamped or otherwise marked on the wheels to indicate size. Is this close enough to 5 x 5inch Kits on your site?

asked by: Levon S

0

Expert Reply:

I would measure the distance between the center of one bolt hole to the center of the bolt hole adjacent to it, and not the diameter. If the distance is:

2-5/8" - the bolt pattern is 5 on 4-1/2
2-3/4" - the bolt pattern is 5 on 4-3/4
3" - the bolt pattern is 5 on 5
3-1/4" - the bolt pattern is 5 on 5-1/2

I have included FAQ article on measuring bolt patterns for your reference.

expert reply by: Chris O

0

Answer 1

I went out to the warehouse and measure the mounting flange bolt pattern and found it to be about 2-13/16" as is shown in the attached picture. If you convert 2-13/16" to decimals it comes out to be 2.812" which is very close to the…

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Answer 2

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 3

Electric Trailer Brake Kit #AKEBRK-35-SA includes the left and right side assemblies but not the drums. We have numerous drums available for 3,500 pound trailer axles. I have included a link to them for you. You mentioned adding brakes to the…

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Answer 4

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 5

The Electric Trailer Brake Kit #AKEBRK-35-SA has a square 4 bolt mounting pattern with the bolts spread 2-13/16" both vertically and horizontally. I have included an image with these measurements.

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Answer 6

The Brake Mounting Flange for 2-3/8" Round Axles that you would need is #4-35. As far as brakes go for your set up, I recommend #23-26-27. There are a few different bolt patterns that will determine what drums you get and you will want to match…

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Answer 7

No, but your local and state laws may require one. You will need to check anywhere you will be towing the trailer to determine if a breakaway system is required by law. They are also just a good idea in general because they will stop a run away…

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Answer 8

Each brake magnet should have 2 leads, one to power, one to ground. Most of the time, folks just ground the magnet to the trailer frame, and use the trailer frame itself as the ground circuit. I'd recommend finding the point where the wiring…

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Answer 9

You will need several items to add electric brakes to your Carry-On Utility trailer. Starting with the trailer you will need a hub and drum that matches the bearings and seal on your trailer spindle and your wheel bolt pattern. The only way to be…

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Answer 10

To determine the size of the brake assemblies you need you have to measure the depth and width of the hub drum on the axle like what you see in the picture I attached. The most common size is 2-1/4 inch wide like the #T4071600-500 that you…

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Answer 11

Absolutely! Once the 10mm bolt was removed from the frame of the 2021 Toyota Tacoma, we put the terminal end of the ground wire of the Plug-and-Play Wiring Harness for Redarc Tow-Pro Trailer Brake Controllers #RED99FR and reinstalled the bolt. You…

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Answer 12

The bolt pattern for a 5 bolt brake mounting flange, like #4-44-1 is 5 on 3-7/8 inches. What that means is it measures 3-7/8 inches from one corner to its diagonal counterpart. From hole to hole across the bottom is 3 inches and between the others is…

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Measuring Bolt Pattern To Determine Which Electric Brake Assembly to Use

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