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  1. Trailer Hubs and Drums
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  3. 4 on 4 Inch
  4. For 2200 lbs Axles
  5. Hub with Integrated Drum
  6. 10 Inch Wheel
  7. 12 Inch Wheel
  8. 13 Inch Wheel
Dexter Trailer Hub and Drum Assembly for 2,200-lb Axles - 7" Diameter - 4 on 4

Dexter Trailer Hub and Drum Assembly for 2,200-lb Axles - 7" Diameter - 4 on 4

Item # 8-173-16UC3
Our Price: $110.21
Trailer Hubs and Drums
This item qualifies for Free Shipping
Shipping Weight: 14 lbs
In Stock
8-173-16UC3 - 1/2 Inch Stud Dexter Hub with Integrated Drum
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This hub-and-drum assembly fits 2,200-lb axles with BTR spindles. Compatible with electric and hydraulic brakes. Inner bearing (L44649) and race, outer bearing (L44649) and race, grease seal, grease cap, wheel bolts, and lug nuts included. Great Prices for the best trailer hubs and drums from Dexter. Dexter Trailer Hub and Drum Assembly for 2,200-lb Axles - 7" Diameter - 4 on 4 part number 8-173-16UC3 can be ordered online at or call 1-800-940-8924 for expert service.
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  • Reviews (30)
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Dexter Trailer Hubs and Drums - 8-173-16UC3

  • 4 on 4 Inch
  • For 2200 lbs Axles
  • Hub with Integrated Drum
  • 10 Inch Wheel
  • 12 Inch Wheel
  • 13 Inch Wheel
  • Standard
  • 1/2 Inch Stud
  • L44649
  • L44649
  • Dexter

This hub-and-drum assembly fits 2,200-lb axles with BTR spindles. Compatible with electric and hydraulic brakes. Inner bearing (L44649) and race, outer bearing (L44649) and race, grease seal, grease cap, wheel bolts, and lug nuts included.


  • Trailer hub-and-drum assembly provides surface area for brake shoes to grip when brake is activated
    • Compatible with electric and hydraulic drum brakes
  • Sturdy iron construction
  • Bearings, races, grease seal, grease cap, wheel bolts, and lug nuts are included
  • Hub and drum are made in the USA


  • Application: 2,200-lb trailer axles with BTR spindles
  • Wheel size: 10" to 13"
  • Drum dimensions: 7" diameter x 1-1/4" wide
    • Works with 7" x 1-1/4" brake assembly
  • Bolt pattern: 4 on 4"
  • Grease cap flange diameter: 1.98"
  • Wheel bolt diameter: 1/2"
  • Weight capacity: 1,100 lbs

Bearing, Race, and Seal Information

  • Bearings (included)
    • Inner bearing: L44649 (1.063" inner diameter)
    • Outer bearing: L44649 (1.063" inner diameter)
  • Races (included)
    • Inner race: L44610
    • Outer race: L44610
  • Grease seal (included): 10-9
    • Inner diameter: 1.5"
    • Outer diameter: 1.987"

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"

008-173-91 Dexter Trailer Hub and Drum Assembly - 2,200-lb Axles - 4 on 4

Replaces 8-173-16UC3 and HD701BUC3

Customer Satisfaction Score:

Customer Reviews

Dexter Trailer Hub and Drum Assembly for 2,200-lb Axles - 7" Diameter - 4 on 4 - 8-173-16UC3

Average Customer Rating:  4.0 out of 5 stars   (30 Customer Reviews)

This hub-and-drum assembly fits 2,200-lb axles with BTR spindles. Compatible with electric and hydraulic brakes. Inner bearing (L44649) and race, outer bearing (L44649) and race, grease seal, grease cap, wheel bolts, and lug nuts included.


Was really wanting to go 5 on 4 1/4, Went together OK, still need to road test. Shipping was awful, loos parts damaged and missing

I hate to see that parts arrived damaged out of the hub assembly. I will have out customer service team reach out.
-- Etrailer Expert Jenny N - 08/13/2022


Very well detailed order recap. I like how the videos and parts details are shown with the current order. Well done.


These are to replace old 7 1/4" brakes on an older pop up camper frame that I built a small camper on. Looks they will work perfectly with the new Dexter 7" brake assembles I have.


The hubs are great, easy install and perfect fit. Can't wait to try out them and the new electric brakes I installed.


Erica at was extremely helpful in helping me select the right breaks for my trailer application. The ship time was incredibly fast installation was a breeze and customer service is top notch!!!


Seal is bent a bit. I can still use it.


Ordered 4 parts as part of an update to my tandem axle trailer. The correct lip seal is included with 3 and one has the wrong lip seal(too wide and wrong ID). Compatibility information with other parts ordered (brake assemblies in this order) is valuable.


corect part, good quality.


A year ago I bought these as part of an overhaul for a 1976 coleman pop-up camper. Many parts on it were obsolete, so I had to change the drums along with the entire suspension. I am pleased to say they work great with my electronic brakes! We've taken our refurbished trailer on 2 long-distance trips (including one into the mountains) and the brakes and drums perform very well!


Everything in one package taped to the hub. I would have offered more protection for shipping to the bearing and seal then just taping it to the hub but it did arrive unscathed. Quality seemed good. Went together easy. Lost the first dust cap on my first trip around the block for a brake adjustment test. Lost the second on the second trip (about 10 miles). I ordered replacement dust caps and the tap on tool. Not sure if I didn't have them on well enough or if there is a product problem there. I have done a lot of these and never had a problem before.


First of all, the product description on the eTrailer website was very detailed and very complete. With all the different axle sizes and types out there, it was nice to have the specs to make sure I was ordering the right part.

I like the shipping tracker. It's easy to use, and I knew where the shipment was, and when to expect delivery. That was nice, because my hub arrived a day later than I thought it would. (When you order on Good Friday, on Easter weekend, 3 day shipping might take an extra day. I should have expected that.)

I thought that rebuilding the existing hubs would be a good idea. And it was. But while driving the new bearing race into place, I let the race get crooked, and I cracked the hub.

The old hub uses bolts to mount the wheel. The new hub has studs and lug nuts, which makes tire changing much easier. The new hub comes with the race pre-installed, just have to apply grease and tap in the rear seal. very easy.

All things concidered, I'm very happy with the entire process, and will probably order a roof rack for my pop up camper from etrailer in the near future.


I had to replace one hub on my pop-up camper and decided I should do both wheels. The parts I ordered came very quickly (3 days), without having to pay extra for quick shipping. The parts matched perfectly and the job went very smoothly. My only complaint is that one of the hub covers/grease seals was dented and bent. It looks like it was damaged during shipment as it was not packaged separately but instead was taped to the outside of the hub. Luckily one of my old seals was reusable and everything worked out.


The first 2 drum and hub combos i got were machined crooked and the second set had to be turned on a drum lathe before the brakes would work properly. I lost time and money being broke down and paying to have the drums checked and turned at a machine shop. Maybe made in China? The people at e trailer were helpfull and prompt no complaints there, just the quality of product.


Not sure if these hubs are going to work. Spent a hour today installing and found small size differences between old and new ones. I thought kit was supposed to include everything, but it was missing cotter pins and bearing washers. This was not my first purchase from etrailer, but I could of used more information on hub dimensions. I was replacing surge brake hubs for a 1992 Jayco popup. I would suggest adding links to mechanical drawings with guidance on what and where to measure to get the best product.


I received my parts, packed the bearings, installed the brakes and backing plates assemblies. installed the drum and hubs, adjusted the brakes and on the road we go. It took 1 hour to do both sides and they fit perfect. Thanks


Electric Brake kit for trailer this time.
The parts are very acceptable and the service is supreme.
Couldn't get any better service anywhere. I've bought a lot of items from etrailer for a couple years now. I have had great experiences with each and every order.




LARRY S - 12/28/2014


Fit my 1997 Starcraft Starflyer 1021 popup camper. Only problem was that it came with the wrong bearings (came with L44643 instead of L44649). Had to call and now I have to wait another week to do the job.


Exactly what I needed for conversion from hydraulic to electric brake system on 1994 Jayco King pop-up camper.


As advertised


We received our order in record time. The representative was most helpful, and we received the item that we needed.


all parts were there, and works OK.


no problem all went great


Came extremely fast and just what I ordered and needed.


Show More Reviews

See what our Experts say about this Dexter Trailer Hubs and Drums

  • Replacement Brake Drum for a 1998 StarCraft 2408 Pop Up Trailer
    When trying to find the correct drum brakes, a measurement of the inside drum diameter and the depth of the drum will be needed. See attached picture. The drum that you referenced, # 8-173-16UC3, measures 7 inches in diameter and 1-3/4 inches deep. Also this drum will have a 4 on 4 bolt pattern. If your drum has this measurement and your current shoes measures 1-1/4 inches wide, then this will be the correct part and work it well for your pop up camper. I have also attached an article...
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  • Distance from Wheel Surface to End of Drum on Hub & Drum Assembly for 2,200 lbs. Axles 8-173-16UC3
    I went out to the warehouse and pulled hub and drum assembly # 8-173-16UC3 to measure it for you. From the surface where the wheel would sit to the end of the base of the drum is approximately 3-7/8 inches.
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    Image 1 for
  • Diameter Of Grease Cap Included With # 8-173-16UC3 Hub And Drum Assembly
    I went to the warehouse and measured the grease cap that is included in the Dexter Hub and Drum Assembly # 8-173-16UC3. The diameter of the grease cap that is inserted in the hub measures 1.98 inches.
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  • Replacement Hub and Drum Assembly for 1974 Tee Nee Boat Trailer with 7 inch Electric Brake Drum
    The information you provided is great! From your part numbers I was able to find that the bearings would be a direct switch but that the grease seal and grease cap dimensions on the hub you have and the, 8-173-16UC3, 4 on 4 Trailer Hub / Drum Assembly are different. The, HD700ACU3, Complete hub and drum assembly is the part you would need for a direct replacement.
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  • Recommended 7-Inch Hub And Drum Assembly For Electric Brakes
    We do offer just the 7-inch hub and drum without bearings, seals, and races for hydraulic brakes but we do not sell the hub and drum for electric brakes without those components. The hub and drum assembly I recommend is part # 8-173-16UC3. This does come with the bearings, races, grease seal, grease cap, and lug nuts and is rated for 2,000-lb axles. This assembly does have a 4 on 4-inch bolt pattern.
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  • Smallest Diameter Rim the Trailer Hub & Drum Assembly # 8-173-16UC3 will Fit
    The smallest diameter rim the Trailer Hub & Drum Assembly # 8-173-16UC3 is compatible with is a 10 inch rim. It would not work with an 8 inch rim.
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  • Picking Out Replacement Axle for 2005 Coachman Clipper
    That picture of your wheel is pretty crazy! I hope the damage was minimal and no one got hurt! If you damaged a bearing there's a pretty good chance you also damaged the spindle it rides on. You'd need to inspect the spindle to make sure it's free of damage. If it's damaged it's probably a good idea to just replace the axle since you are already at the point of replacing most of the axle. Especially if the hubs are currently pretty rusty on both sides most likely. You are going to need...
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    Image 1 for Image 2 for
  • Can Electric Trailer Brakes be Added to a Harbor Freight Kit Trailer
    Neither of those Harbor Freight trailers has brake mounting flanges on the spindles. To add electric brakes you would have to have brake mounting flanges welded on. This is a precision job that requires a special jig and someone with experience in welding on flanges. I have included a link to the flanges we carry to the right. You would also need to replace the idler hubs on the trailer(s) with hub and drum assemblies. The problem with that is the Harbor Freight trailers use uncommon bearings...
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  • Brake Controller Recommendation to Activate Electric Over Hydralic Brakes
    Sounds like you have an electric over hydraulic actuator on your second trailer. Some brake controllers like the Prodigy P2 brake controller part # 90885 can be switched into EOH mode and will work to control the brakes easily. Some actuators have adapters that will allow any electric brake controller to be used with them but these aren't always reliable. Your best option would be to go with a brake controller that is confirmed to work on EOH brake systems like your trailer has like the...
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  • Replacement Axle for Harbor Freight Trailer
    In order to find a replacement axle for your Harbor Freight trailer you will need to take some measurements to determine the correct axle length. The most important measurement is the distance from hub face to hub face. Additionally, you can measure the spring center distance. When replacing your trailer's axle, you should be able to figure out which type you need by determining your trailer's capacity, the bolt pattern of your wheels, the brake type and these measurements. If you provide...
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  • Can 7 x 1-1/4 Inch Electric Trailer Brakes be Used w/Hydraulic Brake Hub for 7 x 1-3/4 Inch Brakes
    Hub and drum assembly # 8-276-5 is not a proper fit for 7 x 1-1/4 inch brake assemblies and should not be used with them. I know you are looking to save some money but believe me, you can spend a little now on the correct hub and drum assembly, # 8-173-16UC3, or a lot later after the additional length of the hub stress the bearings and spindles and you are looking at replacing the axles.
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  • Recommended Longer Wheel Lug Nut for Trailer Hub and Drum Assembly with 1/2 Inch Wheel Bolts
    I've got just the chrome 1/2 inch wheel lug nut you need. The Redline # 12CLN will work on your # 8-173-16UC3 1/2 inch wheel bolts. They are sold individually, so you will want to update the quantity to 8 for one axle. I have linked the chrome lug nut to this page for your purchasing convenience.
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  • Hub/Drum with 4 Lug Bolt Pattern that can be Used with 2k Brake Assembly Set # AKEBRK-2
    The trailer brake assembly set part # AKEBRK-2 that you referenced are for 2,000 lb axles so for a 4 lug bolt pattern hub/drum that you can use with this you'd just need the # 8-173-16UC3 as long as your spindle is the BTR spindle that has bearing surface diameters of 1.06 inch.
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  • Converting 1994 Jayco Camper From Hydraulic Brakes to Electric Brakes
    I have attached a great article at the bottom of this page that details all the components needed to install electric brakes on a trailer. The particular parts you need will depend on the camper's axle capacity along with the inner and outer bearings that are used on your existing hubs. This is needed to determine the correct hub and drum assemblies that will fit the spindles on the axle. If you can tell me the inner and outer bearing numbers, which should be stamped right inside the...
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  • Recommended Replacement Brake Assemblies for Viking 2107 ST Pop-Up Camper
    The American-Made Dexter # K23-103-104-00 brake assemblies would be absolutely the correct application for your Viking Pop-Up. The brake assemblies are compatible with 12 inch wheels used by your 145R80 tires. The installation is pretty easy if you're moderately handy. The video I've linked for you will provide an overview of what's involved. The video shows a larger brake assembly being installed, but the procedure for a 7 inch assembly would be pretty similar. Really the only difference...
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  • Dexter Torflex #9 1000-2200 lbs Axle Hub and Bearing Kit Replacements
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  • Diameter Of Hub On Trailer Hub And Drums With 4 On 4 Bolt Pattern
    I went to the warehouse and measured the hub on both the # 8-173-16UC3-EZ and the # 8-276-5 hub. The outside hub measurement for the 8-173-16UC3-EZ is 2.47-inches. The outside diameter of the hub for the # 8-276-5 hub measures 2.06 inches. Both of these hub assemblies have a 4 on 4-inch bolt pattern so I have attached a link to the tire/wheel combos with 4 on 4 bolt patterns you can check out.
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  • Will the 7 Inch Trailer Hub/Drum # 8-173-16UC3 Fit on a 1987 MGS Handyman Cargo Trailer
    It sounds as if the wheels that are on your trailer are hub piloted, meaning that the center of the wheel is mated to the outer diameter of the hub not on the mounting studs. In this case the dimension of the hub protrusion is critical for balance of the wheel and tire. At this time we do not carry hub piloted hub and drum assemblies. You may find that these style hubs are only available from the trailer manufacturer. The # 8-173-16UC3 Hub and Drum Assembly, would work for your trailer...
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  • Smallest Wheel Size Allowed for Dexter 2,200 Lb Axle with 7" Brakes
    The trailer hub/drum is what dictates wheel size and I looked up the minimum wheel size on all of our Dexter Trailer Hubs/Drums for 2,200 Lb Axles like part # 8-173-16UC3 and they all list the minimum wheel size as 10". The Kenda 205/65-10 Bias Trailer Tire with 10" White Wheel part # AM3H410 will be a great option for this. It only measures 20.6" diameter x 8.3" wide and is designed for a 4 on 4" lug pattern like the above hub/drum.
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  • Replacement Wheel Studs for Trailer Hub part # 8-173-16UC3
    The trailer hub part # 8-173-16UC3 uses 1/2 inch diameter 2 inch long wheel studs like the part # RG03-060.
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  • Added Surge Brakes to a Pontoon Boat Trailer with 4 on 4 Bolt Pattern
    We have two different drums available for your 4 on 4 setup, but in order to determine which is correct, we need to get your old bearing numbers. Your hubs will have two bearings, an inner and an outer. When we determine what the bearing numbers are we can find the right hub/drum. The numbers will be stamped on the bearings themselves. You only need to disassemble one side of the trailer. I have added a link to a video that covers removing seals and bearings from a trailer hub. If your...
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  • Correct 7 inch Electric Drum Brake Assemblies and Hub and Drums for Little Guy Silver Shadow Trailer
    The Dexter brake assemblies, part # K23-103-104-00, are for 10 to 13 inch rims. They're designed for 2,200 pound axles that have a 7 by 1-1/4 inch drum. The hubs for a 2,200 pound axle that we carry have a 4 on 4 bolt pattern; parts # 8-173-16UC3-EZ for E-Z lube axles and # 8-173-16UC3 for standard axles. You need to verify that your Little Guy Silver Shadow uses bearings # L44649 for both the inner and outer to confirm the hubs are correct.
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  • How To Determine Axle Capacity of Trailer with 4 Lug Hubs with Brakes
    The only way to know for sure is to check your bearings. That being said, the most common 4-bolt configuration is a 4 on 4 bolt pattern, which are typically found on 2,000 lb to 2,700 lb trailer axles. The only 4 on 4 bolt pattern hub and drum assemblies we carry are for 2,200 lb axles and use # L44649 inner/outer bearings. See below. Compatible with 7 inch x 1-1/4 inch electric and hydraulic brakes # 8-173-16UC3 - Includes bearings, races, grease seal, standard grease cap and lug nuts. #...
    view full answer...
    Image 1 for Image 2 for
  • Adding 7 Inch Electric Trailer Brakes to Trailer With Idler Hubs
    If your existing hubs use a L44649 bearing with an ID of 1.063, we have a solution for you. You'll want to measure the ID of your existing bearings to confirm. A digital caliper like # PTW80157 is an easy way to get an accurate measurement of your bearing's inner diameter. If your existing hubs use the L44649 bearings, you can use the Dexter # 8-173-16UC3 which is compatible with a standard spindle or # 8-173-16UC3-EZ compatible with an EZ lube spindle. For a brake assembly, use # 23-47...
    view full answer...

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