Your old drum is grooved and the brakes are grabbing weird. You pull that old one off, line up the new one, and everything fits. Bearings are packed and the lugs torque down smooth. Now your trailer brakes like it should.
The first number in the bolt pattern is the number of bolt holes. The second number denotes the diameter, in inches, of the circle on which the bolt holes sit.
On wheels with an even number of bolt holes, measure from the center of one bolt hole to the center of the hole directly across from it. (Example: 8 on 6-1/2 means 8 bolt holes with 6-1/2" from the center of one hole to the center of another on the opposite side.)
To determine the bolt-circle diameter on wheels with an odd number of bolt holes, measure from the center of any bolt hole to the point halfway between the two bolt holes directly across from the first. (Example: 5 on 4-1/2 means 5 bolt holes with 4-1/2" measured to a point halfway between the opposite bolt holes.)
Measuring the distance (D) from the center of one bolt hole on the wheel to the center of a bolt hole right next to it can also help to determine the bolt pattern.
Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Hi, everybody, Andy here with etrailer.com. Let's take a real quick look at this Terran Axle Trailer Hub and Drum Assembly. Now, this is going to fit your 3,500-pound trailer axles. This is going to work with most standard trailer axle setups. This 10-inch brake drum is going to give you the surface for your brake shoes to grip during braking, and this is going to work with electric and hydraulic drum brake systems. If you notice here we have a five on five-inch bolt pattern, and in case you don't know, the first number in the bolt pattern is going to be the number of bolts, but then that second number is the diameter in inches of the circle on which the bolts sit.
So, to determine the bolt circle diameter on wheels or with hubs that have an odd number of bolts, you're just simply going to measure from the center of any bolt hole to the point that is halfway between the two bolt holes directly across from the first. Now, this does come with pre-greased bearings, so inside already, we have the races that have already been pressed in, and then we have our inner bearing along with the seal. So, that has been pressed in packed with grease, and then when you get this, you'll just have to pop in that outer bearing, and then this also does include a cap as well. So, really not a whole lot of extra prep is going to be needed except to put in that bearing and then the cap, and then make sure that you got enough grease here for that bearing. So, basically everything that you see here is what you're going to receive.
But if you haven't had any other additional questions, don't hesitate to reach out to us. We do wanna be sure that you're getting exactly what you want and need. Also, I failed to mention you do get the lug nuts there that I have already on the bolts there. But I think that's gonna wrap up our quick look today. I do hope that it was helpful for you.
Again, my name is Andy, thank you for joining me.
Fit perfect
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