How to Choose Correct Replacement Electric Brakes

Question

Question:

I have no clue what they axle are on my 20 foot cattle trailer. I know the are 6 bolt 15 inch chevy large hole rims that fit the hubs. Now what i want to do is replace the entire break backing plate and breaks. So what measurements do I need to take? Thank you

asked by: Bob P

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Expert Reply:

To determine the correct brake assemblies that will fit your trailer, you need to know your axle's weight capacity, the size of your wheels, your mounting flange bolt pattern, which will be 4-bolt or 5-bolt and will depend on the diameter of your axle. For example, 4-Bolt Brake Mounting Flange # 4-35 will fit a 2-3/8" round axle. You are also going to need to measure the inside diameter and depth of your drum.

I've added a link for you to a help article on what you need in order to electric brakes which I strongly recommend reading; if you get back to me with this information I would be able to tell you what you'll need.

expert reply by: Kyle S

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Answer 1

When measuring to determine the bolt pattern of a wheel with an odd number of lugs, like a 5 lug wheel, you are basically measuring the diameter of a circle that would run through the center of each lug hole. If you are measuring the wheel the…

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Answer 2

You would indeed need to update the trailer connector which luckily enough is pretty straightforward. I'd recommend using the #HS381-9000 which incorporates both a trailer connector and a junction box which provides a secure place to make your…

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Answer 3

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 4

The difference between an load range C and load range D tire in the same size is the capacity and psi rating. The two tires will still have the same dimensions and fit on the same wheel. The D rated tire has a higher capacity. For a ST175/80D13 like…

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Answer 5

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 6

Load range B trailer tires are going to have a lower capacity than C load range tires. Basically that, psi rating, and the ply rating are the only differences. A higher load range tire would last a little longer than lower load ranges of the same…

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Answer 7

Yes, the Kenda Karrier ST175/80R13 Radial Trailer Tire #AM31990 will indeed fit on the etrailer Hitch Mounted Spare Tire Carrier #e98ZR. The spare tire carrier will work with virtually any 4 lug, 5 lug or 6 lug wheel. The #AM31990 wheel uses the…

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Answer 8

I am sorry I don't have any tires that are going to fit your rim. I do have a couple of comparable size tires that come in a wheel tire combo. I have listed the two below along with their lug patterns. 5 on 4-1/2 Lug Pattern - Kenda 205/65-10…

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Answer 9

The three most common lug stud sizes for a trailer are 1/2"-20, 9/16"-18, and 5/8"-18. In order to make sure you get the correct lug nuts you need to measure the lug studs on the trailer now as we have no way to look this up for…

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Answer 10

You can add larger wheels and tires to a trailer as long as you have enough room for the larger size. The main clearance issues we find when putting larger tires and wheels on a trailer is from the top of the tire to the fender and from the inside…

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Answer 11

Hey Kevin thanks for your question. There is not much downside to going with the 5,000 lb springs instead of the 3,500 lb. A higher rated spring may make the ride a bit more "chunky" at times, since the spring would not flex as easily.…

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Answer 12

Your math is correct in your trailer weight load example. If a fully-loaded tandem axle trailer weighs 4000-lbs then each of the 4 tires will bear 1/4th of that load, or 1000-lbs. In this case a tire rated for 1300-lbs would provide a good safety…

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