Trailer hub-and-drum assembly includes lug nuts, inner bearing (25580) and race, outer bearing (14125A) and race, grease cap and grease seal. Fits 5,200-lb to 7,000-lb axles with spindles that require a 2-1/8" ID grease seal. Lowest Prices for the best Trailer Hubs and Drums from Dexter. Trailer Hub and Drum Assembly - 5,200-lb to 7,000-lb Axles - 8 on 6-1/2 - 1/2" Studs part number 8-219-4UC3 can be ordered online at or call 800-298-8924 for expert service.
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Trailer Hubs and Drums > Hub with Integrated Drum > Standard > For 5200 lbs Axles, For 6000 lbs Axles, For 7000 lbs Axles > 8 on 6-1/2 Inch > 12 x 2 Inch Drum > 16 Inch, 16-1/2 Inch, 17-1/2 Inch > 25580 > 14125A > Dexter

Trailer Hub and Drum Assembly - 5,200-lb to 7,000-lb Axles - 8 on 6-1/2 - 1/2" Studs

Dexter Trailer Hubs and Drums

(4 reviews)

Code:   8-219-4UC3



Shipping Special

Shipping Weight: 40.14 pounds


Dexter Trailer Hubs and Drums - 8-219-4UC3

Trailer hub-and-drum assembly includes lug nuts, inner bearing (25580) and race, outer bearing (14125A) and race, grease cap and grease seal. Fits 5,200-lb to 7,000-lb axles with spindles that require a 2-1/8" ID grease seal.


  • Application: 5,200-lb - 7,000-lb Dexter axles
  • Works with both electric and hydraulic brakes
  • Drum dimensions: 12" diameter x 2" wide
  • Stud diameter: 1/2"
  • Bolt Pattern: 8 on 6-1/2"
  • Includes bearings, races, seal, grease cap, wheel bolts and lug nuts
    • Bearings:
      • Inner bearing: 25580
      • Outer bearing: 14125A
    • Grease seal: 2-1/8" inner diameter
    • Grease cap outer diameter: 2.72"
  • Capacity: 3,500 lbs

Determining the Bolt Pattern

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.

Bolt Pattern - Even

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.)

Bolt Pattern - Odd

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.)

Bolt Pattern - Side

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.

  • If D = 2-5/8", then the bolt pattern is 5 on 4-1/2"
  • If D = 2-3/4", then the bolt pattern is 5 on 4-3/4"
  • If D = 3", then the bolt pattern is 5 on 5"
  • If D = 3-1/4", then the bolt pattern is 5 on 5-1/2"

8-219-4UC3 Trailer Hub and Drum

Video of Trailer Hub and Drum Assembly - 5,200-lb to 7,000-lb Axles - 8 on 6-1/2 - 1/2" Studs

Videos are provided as a guide only. Refer to manufacturer
installation instructions and specs for complete information.

Video Transcript for Dexter Trailer Hubs and Drums 8-219-4UC3 Review

Today were going to review part number 8-219-4UC3. This is the Dexter Trailer Hub and Drum Assembly with an 8 on 6-1/2-inch bolt pattern for 1/2-inch studs. This trailer Hub and Drum Assembly will include your eight 1/2-inch cone seat lug nuts. It will include the inner bearing, part number 25580, it will include the outer bearing part number 14125A, it will include the grease seal which is a 2-1/8 inch diameter grease seal, and will also include the grease cap which goes over the hub right there. Now the bearing races are included also. They are already installed, pressed into the hub.

There is the outer, and when I spin this around youll be able to see the inner race right there. The application on this Hub and Drum Assembly will fit the 5200 to 7000-lb Dexter axles. It has a drum dimension of 12 inches by 2 inches wide. The stud diameter for the wheel studs is 1/2 inch. The bolt pattern is an 8 lug 6-1/2 inch pattern.

Now the capacity on this Hub and Drum assembly is 3500 lbs. So when this one is used with another Hub and Drum Assembly on the other side of the axle it will give you the max of 7000 lbs. I do want to give you a few dimensions. The bolt pattern which we mentioned is 8 lugs 6-1/2 inch. So basically the way you would measure that is on a Hub and Drum that has an even amount of lugs which in this case would be eight, you just take one or pick any of the studs and measure from the center of that to the one directly across from that.

So if you go from center to center it will be 6-1/2 inches and that will give you the 8 lug 6-1/2 inch bolt pattern. The other dimension I would want to give to you is the drum size. It is 12 inches. Thats the measurement of the inner of the drum. And then the width will be 2 inches.

So this Hub and Drum assembly will work with 12-inch by 2-inch brake assemblies. And that should do it for our review on part number 8-8-219-4UC3.

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Customer Reviews

Trailer Hub and Drum Assembly - 5,200-lb to 7,000-lb Axles - 8 on 6-1/2 - 1/2" Studs - 8-219-4UC3

Average Customer Rating:  5.0 out of 5 stars   (4 Customer Reviews)

Trailer hub-and-drum assembly includes lug nuts, inner bearing (25580) and race, outer bearing (14125A) and race, grease cap and grease seal. Fits 5,200-lb to 7,000-lb axles with spindles that require a 2-1/8" ID grease seal.

- 8-219-4UC3

by: Rob05/01/2011

Received hubs within a week of ordering. Contained all parts for a complete changeout. Would recommend both these hubs and 12646


what drum and hub assy do i need to convert my house tralier axles to use regular tires and wheels? im having trouble finding tires for them. bearing, outside 1.25, inside 1.75, 2 brake drum, 5 or 6 holes wheel.

comment by: pete b - 07/21/2013


Most mobile home axles are built with an odd sized spindle that do not have any available hubs with a traditional trailer wheel bolt pattern. The only want to be sure is to either get the bearing numbers off the old bearings or to measure the spindle diameters with a dial or digital caliper, at least to the 1/100th. Bearing numbers is by far the easiest. Check out the link to the spindle below. There is a diagram that shows the measurements that you will need to take in order to positively determine whether or not a hub is available.

Patrick B - 7/23/2013

- 8-219-4UC3

by: Ken T.03/08/2015

I am very pleased with etrailer. The product was as I ordered and I was very pleased with the delivery time. I received my shipment within two days. Now all I need is warm dry weather in order to complete my project. Thanks etrailer, I will order more product soon. Ken T. 177509

- 8-219-4UC3

by: Bill H04/26/2015 is the best online company I have found to buy quality trailer parts. This Dexter part is high quality. You can depend on Dexter quality. etrailer shipped my order immediately. You can't go wrong with the quality and service from etrailer. 188303

- 8-219-4UC3

by: Bob C.11/01/2013

Product, service and delivery are great 105920


Ask the Experts about this Dexter Trailer Hubs and Drums
Do you have a question about this Trailer Hubs and Drum?

  • How to Choose the Correct Brake Assemblies and Hubs and Drums for a 7000 lb AL-KO/Hayes Axle
  • We do have replacement AL-KO/Hayes brake assemblies for 7,000 lb axles, # 185100, for left side and # 185150 for the right. These are 12 inch by 2 inch electric brake assemblies that will mount to AL-KO/Hayes 4-bolt pattern or standard 5-bolt pattern brake mounting flanges. The way to determine what hub and drum you need is to remove the old hub and find the bearing and seal part numbers. These part numbers will be stamped into the metal of the bearings and most likely in the rubber...
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  • Trailer Wheel Pilot Hole Diameter is Too Small for New Hub and Drum Assemblies
  • If the pilot hole on the wheel was larger than 4-3/4 inches, and the wheel is center on the hub using the lug nut rather than wheel bolts, it would not matter. But since the wheel pilot hole is smaller, you will not be able to use the hubs you purchased without also replacing the wheels. I went out to the warehouse and measured a Trailer Hub and Drum Assembly, # 42866UC3, to determine the diameter of the center portion that goes through the pilot hole of the wheel. Using some digital...
    view full answer...

  • Number 42 Spindle Recommendation
  • We do have a Dexter number 42 spindle. For a standard spindle you would want the part # R50642. For the EZ lube version you would want the part # R50342EZ. This comes with a brake mounting flange. The seal inner diameter needed for this would be 2.24. The bearing dimensions you referenced are correct.
    view full answer...

  • How to Pick Out a Hub and Drum to Go to a Different Bolt Pattern
  • Yes, you can go to a hub with a different bolt pattern as long as you match everything up. You will need to make sure the bearing numbers are the same and that your brake assemblies are the same size. The Trailer Hub and Drum Assembly # 8-219-4UC3 that you referenced uses inner bearing number 25580, outer bearing number 14125A and is designed for 12 inch by 2 inch brake assemblies. You should note that going to a hub with a higher towing capacity does not necessarily give you more...
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  • Can Existing Grease Lube Hub Assembly be Replaced With Oil Bath Lubrication
  • I would recommend that you install Trailer Hub & Drum Assembly, part # 8-219-9UC3, on your trailer. This hub is identical to the Trailer Hub & Drum Assembly, part # 8-219-4UC3, that you referenced except it is setup for oil bath bearings instead of grease bearing. These hubs have a 2-1/8 inch seal. The Oil Cap Kit, # RG04-270, is threaded and would only work on hubs that are threaded for screw in style caps. This would not work on the # 8-219-4UC3 as it takes press in style caps.
    view full answer...

  • Selecting Correct Bearing Buddy for 8-Lug Hub on 7000-lb Axle on PJ Dump Trailer
  • Selecting the correct Bearing Buddy bearing protector for your 8-lug hubs requires that you know the hub's bore where the grease cap (or Bearing Buddy) fits. This requires using a precision digital or dial caliper and measurement to the nearest thousandth - 3 decimal points. You also want to note whether you hubs are threaded or non-threaded as we offer both types of Bearing Buddy. For example, we offer an 8-lug hub for 7K axles, part # 8-219-4UC3, and this hub's bore happens to be 2.720-inches...
    view full answer...

  • How to Determine Which Replacement Hubs are Needed for a Kaufman Car Hauler
  • In order to determine which hub you will need for your Kaufman car hauler you will need to get some information from the hub of your trailer. The first thing you are going to need to do is remove the hub and give me the bearing numbers that are stamped on the inner and outer bearings of the hub. The next thing you will need to give me is the bolt pattern from the wheels/hubs you are replacing. You will also need to know what size studs are on your hubs. I attached an FAQ article on...
    view full answer...

  • Hub and Drum Assembly Needed for a 1979 Featherlite Horse Trailer with 6000lb Axles
  • It sounds as if you will need the trailer hub and drum assembly # 42866UC3, which has an 8 on 6-1/2 bolt pattern and uses the # 25580 inner bearing (1.75 inch inner diameter) and # 14125A outer bearing (1.25 inch inner diameter). This assembly works with a 12 x 2 inch brake assembly like left hand electric brake assembly # 23-105, and with wheels that use 1/2 inch studs. There are numerous other possibilities, like 12 x 2-1/4 inch brake assemblies, different bearing part numbers,...
    view full answer...

  • Determining the Right Brake Assembly and Hub Drum H and H Cargo Trailer
  • To get the correct brake assembly, you need to know the axle weight capacity, the backing plate bolt pattern, and the dimension of the drum. A 7000 lb axle would typically use a 12 x 2 assembly with a 5 bolt backing plate. Parts # 23-464 and # 23-465 are a good example. For replacement drums, we would need to know the wheel bolt pattern (which is typically 8 on 6-1/2) and the reference numbers off of the existing wheel bearings. Part # 8-219-4UC3 would be a typical hub and drum for a...
    view full answer...

  • Proper Way to Tighten Trailer Spindle of Castle Nut
  • After you've packed the bearings and assembled everything, carefully slide the hub assembly onto the spindle and install the outer bearing. Install the spindle and tang washer and run the spindle nut down finger tight, then rotate the hub back and forth then rock the hub side to side to make sure everything is seated properly. This will have had provided more room on the spindle, so run down the spindle nut with your fingers a bit more. The hub should spin freely, with a bit of brake lining...
    view full answer...

  • How to Correct for Extreme Stress and Bearing Damage on 5200-Lb Torsion Axle on Tandem Trailer
  • If your axle castle nuts are backing off and shearing the cotter pin then this extreme force could be coming from one or more possible causes. I suggest you check your rear axle tire treads for signs of uneven wear. If you notice more wear on the inside edges of the tires this could indicate any of several possible root causes, an overloaded axle, damaged axle or bent spindles. Any one of these conditions could result in wheel misalignment. This condition could in turn lead to excessive...
    view full answer...

  • Replacement Wheel Stud Recommendation for a Trailer Hub and Drum Assembly # 8-219-4UC3
  • The replacement studs for your Trailer Hub and Drum Assembly # 8-219-4UC3 that you referenced are 1/2 inch part # RG03-040. All three hubs you referenced will use this as a replacement stud.
    view full answer...

  • Which Spindle Do I Need To Use with 8 on 6-1/2 Drum and Hub Assembly part # 8-219-4UC3
  • I cross referenced the bearings that Trailer Hub & Drum Assembly - 5,200, 6,000, 7,000 lbs. Axles - 8 on 6-1/2, PART # 8-219-4UC3, uses to determine which spindle you will need. The correct spindle you will need is EZ Lube Spindle 2.25 Inch RD x 3 Inch STUB, part # R50342EZ.
    view full answer...

  • What Size Wheel Center Hole Will Fit on Trailer Hub 8-219-4UC3
  • The pilot hole on a wheel would have to be 4.75 inches or larger. It can be larger because this hub uses lug nuts to secure and center the wheel on the hub (lugcentric). If it just had holes for wheel bolts (hubcentric) then the pilot hole would have to be exact.
    view full answer...

  • How to Pick Out a 8 Lug Hub to fit a 5,200 lb Dexter Axle
  • It is hard for me to say with absolute certainty, but most likely the part # 8-219-4UC3 would work for your 5,200 lb Dexter axle since this hub is designed to fit most 5,200 lb Dexter axles. But the only way to verify this would be to either pull your hubs and measure the spindles or get the bearing numbers. This is especially true since you said your outer bearing is a different number than what the # 8-219-4UC3 has. A lot of times the 4,800 and 5,200 axles are the same with the only...
    view full answer...

  • Replacement Axle Recommendation for a Mobile Home Trailer
  • Mobile home axles are designed for one time use and because of that we don't offer replacement hubs that will fit them since the spindles are usually very unique. Best option would be to go with a new axle. I attached a page that has all of the replacement axles we offer. You would want to go with the ones that are the closest in dimension and weight capacity as what you currently have/need.
    view full answer...

  • What Trailer Hub Fits Outer Bearing # 14125A
  • The bearing number you referenced, # 14125A, is an outer bearing that will fit a number of different hub assemblies. Those compatible hub part numbers are # 42866UC3, # 8-219-4UC3 and # 8-231-9UC1-EZ. We also offer the matching race for this bearing, which is part # 14276. The inner diameter of this bearing is 1.250 inches. I have linked an article and several videos on hubs and bearings that may be helpful to you.
    view full answer...

  • Can Electric Over Hydraulic Disc Brake Kit be Installed on Torsion Axles on 2008 Forest River RV
  • If you want to convert your trailer's drum brakes to electric-over-hydraulic disc brakes you'll need to match up the weight capacity of the axles and brake kit and find one that uses the same brake flange, bearings and bolt pattern as your existing hubs in order to ensure that the new hub-and-rotor assemblies will fit your existing spindles and wheels. You may want to take a look at the linked article that covers the details of converting a trailer to disc brakes. We may not offer an...
    view full answer...

  • Recommended Hubs Drums And Electric Brakes For 2000 Trails West 4 Horse Trailer
  • From my research it looks like you have 6,000 lb axles on your trailer. You may want to check to see if there is a plate or sticker that shows the axle weight capacity. If you have a 5-bolt brake mounting flange I recommend the Dexter Nev-R-Adjust Electric Brake Assembly, part # 23-459 for the right hand and part # 23-458 for the left hand. These are designed to use with 12 inch hubs and drums. I have attached links to a product review video and an initial setup video for these brakes....
    view full answer...

Do you have a question about this Trailer Hubs and Drum?

Info for this part was:

Photos by:
Theodore B

Expert Research:
Michael L

Expert Research:
Robert G

Expert Research:
Michael H

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Jeff D

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Updated by:
Adele M

Expert Research:
Adam R

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