How To Determine If Disc Brake Kit Will Work For Trailer


The question I have is, the rotors in this package T4843100 do they fit a 1 3/8 inch by 1 1/16 inch spindle.


Expert Reply:

There are a couple things you will need to know when installing a disc brake kit like part # T4843100, which is designed for 3,500 lb axles. For this kit the inner bearing has 1.378 in inner diameter. The outer bearing has 1.063 inner diameter. The seal inner diameter is 1.719.

We need to determine what spindles you have on your trailer so we can select the right hub rotors. To do that you will need to remove the hubs and get the bearings numbers off the bearings. Check out the attached drawing that shows where the numbers can typically be found.

If you cannot see the numbers on the bearings another way to go is to measure the surface of the spindle where the bearings and seal ride, as the drawing shows.

You will also need to know what your wheel bolt pattern is. I have attached a helpful article that shows you how to measure the bolt pattern of your wheel.

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expert reply by:
Jeffrey L

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