Product Experts Available Now!
Call 1-800-940-8924
Dexter Trailer Idler Hub Assembly for 9,000-lb to 10,000-lb Axles - 8 on 6-1/2 - Oil Bath
(62 reviews)
Price: $482.04
In Stock
We'll connect you with nearby partnered installers who know this exact setup.
Dexter Trailer Idler Hub Assembly for 9,000-lb to 10,000-lb Axles - 8 on 6-1/2 - Oil Bath
Part Number: 8-288-3UC1
In Stock
$482.04
We'll connect you with nearby partnered installers who know this exact setup.
- All Info
- Reviews (62)
- Q & A (0)
- Photos
Dexter Trailer Hubs and Drums - 8-288-3UC1
Highlights
- Fits 9,000-lb to 10,000-lb Axles: For Dexter general-duty models made before July 2009.
- Includes Bearings and Seals: Comes with 387A inner, 25580 outer, races, oil seal, and oil cap kit RG04-270.
- 8 on 6-1/2" Bolt Pattern: Uses 5/8" wheel bolts and handles up to 5,000 lbs per hub.
- Easy Oil-Level Checks: Clear oil bath cap lets you inspect lubricant without taking the hub apart.
- Built for Long Service Life: Sturdy iron hub designed for heavy-duty towing and dual-wheel setups.
Features to know about
Check Lubrication Fast: Clear Oil Bath Design
Keeping an eye on bearing health doesn’t get easier than this. The Dexter Trailer Idler Hub Assembly uses an oil bath setup with a clear cap that lets you check your oil level at a glance—no need to pull the hub apart. Fill it with 90-weight synthetic oil, and you can spot low or cloudy oil right through the window before it becomes a problem. It’s a clean and simple way to stay ahead of maintenance on heavy-duty axles.
Built for Heavy Loads: 9,000-lb to 10,000-lb Capacity
This Dexter hub is made for serious hauling. It’s rated for 9,000-lb and 10,000-lb general-duty axles manufactured before July 2009 and has a 5,000-lb capacity per hub. The sturdy iron construction handles big loads day after day, while the 8 on 6-1/2" bolt pattern with 5/8" wheel bolts keeps things solid under pressure. Torque the lug nuts to 175–225 ft-lbs and you’re ready to roll with dependable strength.
Everything You Need in One Package: Complete Hub Assembly
This setup comes fully equipped so you can get it installed without chasing down extra parts. Included are inner bearing #387A (2.250" ID), outer bearing #25580 (1.750" ID), inner race #382A, outer race #25520, unitized oil seal #10-51 (2.875" ID, 3.880" OD), oil cap kit #RG04-270, wheel bolts, and lug nuts. It’s all matched and ready to go for a straightforward replacement or rebuild.
Simple Fitment for Older Axles: Direct Replacement Design
If you’re working with an older Dexter setup, this hub takes the guesswork out of finding the right fit. It’s built specifically for general-duty Dexter axles made before July 2009 and matches the proper spindle dimensions—inner bearing 387A and outer bearing 25580—with a pilot hole diameter of 4-3/4". That makes it an easy bolt-on fix for worn or outdated components without modification.
Specs
Application
- Axle compatibility: 9,000-lb and 10,000-lb axles manufactured before July 2009
Weight and Capacity
- Weight capacity: 5,000 lbs
Dimensions
- Bolt pattern: 8 on 6-1/2"
- Pilot hole diameter: 4-3/4"
- Wheel bolt diameter: 5/8"
Bearing, Race, and Seal Information
- Bearings (included):
- Inner bearing: 387A (2.250" inner diameter)
- Outer bearing: 25580 (1.750" inner diameter)
- Races (included):
- Inner race: 382A
- Outer race: 25520
- Unitized oil seal (included): 10-51
- Inner diameter: 2.875"
- Outer diameter: 3.880"
- Oil cap kit (included): RG04-270
- 21-36 Cap:
- 10-50 O-ring:
- 46-32 Plug:
Determining Bolt Pattern
1. Count the lug holes
Look at the wheel hub or the back of the wheel and count how many lug holes there are(also called bolt holes).
Common configurations include: 4-lug, 5-lug, 6-lug and 8 lug
2a. For even lug counts (4-lug, 6-lug, 8-lug)
Measure from the center of one lug hole directly across to the center of the hole opposite it.
Common configurations: 4 on 4", 6 on 5.5", 8 on 6.5"
2b. For odd lug counts (5-lug)
Measure from the center of one lug hole to the outer edge of the hole directly across (not center-to-center since there's no directly opposite hole).
Common configurations: 5 on 4.5" (most popular), 5 on 5", 5 on 4.75", 5 on 5.5"
K08-288-91 Dexter Trailer Idler Hub Assembly - Old Style - 9,000 lb Axle made after October, 1989 and 10,000 lb General Duty Axle made through July 1, 2009 - 8 on 6-1/2 - Oil Bath
Replaces 8-288-3UC1
Customer Satisfaction Score:
83% were satisfied with this product
17% of customers were not satisfied
- etrailer mistake
- Wrong item was ordered
Ratings & Reviews
4.4
62 reviews
by:
Jeff
05/11/2026
Fast and reliable.
by:
Coy B
11/06/2022
Fit exactly how everything should. Very helpful when I called with a question got me back up and running.
by:
Bobby B.
08/12/2017
etrailer Troy is great he helped me get the parts i needed and was really concerned about helping. in this day and time thats rare to find someone so helpful. i will recommend Troy and etrailer to everyone. Bobby
by:
John C
08/15/2022
All went well with the shipping and installation. I would recommend etrailer for parts.
by:
Josh
11/26/2024
IT WAS THE PERFECT FIT, SHIPPING WAS QUICK AND CUSTOMER SERVICE WAS GREAT.
by:
Tony
01/05/2021
Great customer service
by:
Osvaldo
01/09/2018
All their products are of good quality and the customer service is even better. Definitely will be buying from them again in the future.
by:
Brad Callahan
03/12/2016
Product works well
by:
Dan
12/06/2018
Great parts great company to work with
by:
Candido
05/10/2024
The right one
by:
Jeremy
05/18/2026
by:
Bruce
05/12/2026
by:
Dan
04/15/2022
by:
William
05/18/2026
by:
Will
02/12/2024
by:
U
07/16/2024
by:
Santiago
08/15/2025
by:
Gary
07/24/2022
by:
Juan
06/26/2021
by:
Douglas
05/05/2023
by:
David
12/05/2024
by:
Chelsie
12/06/2023
by:
Big O
12/02/2025
Etrailer always treats you right. They even have a REAL knowledgeable person just a phone call away. Fast, great prices, and helpful; that's a winning combo!
by:
Alan
11/13/2024
you do not disclose that this is the high profile version of this hub. That being said I needed a low profile version and am down for at least an additional week now waiting on the correct hub from another source.
by:
82 Tires & Service
10/16/2025
On time, and as ordered. Thanks!
25
62
true
Show More Reviews
See what our Experts say about this Dexter Trailer Hubs and Drums
- Looking for Replacement Hub/Drum for XP1590 Bandit WoodchipperHey James, thanks for sending those pictures! Your Dexter Trailer Brake Drum # 9-44-1 that I can see in your picture is designed to fit the Dexter Trailer Idler Hub Assembly # 8-288-3UC1. This drum and hub installs on 9,000-lb to 10,000-lb general-duty Dexter axles made prior to July 2009. Are you looking for brake assemblies too or just the drum/hub?
view full answer... - How to Determine Correct Replacement Hubs for TrailerTo find correct replacement hubs for your Dexter trailer axle you will want to pull one of the existing ones so you can remove its inner and outer bearings. You need these bearing numbers to help you select a new hub that will fit on your axle's spindles. The new hubs must use the same set of bearings as the old ones. Please refer to the linked photo that shows how these numbers are typically stamped into the bearing housing. Once you know your bearing numbers all you need to do is click...
view full answer...
- Availability of Dexter Idler Hub for 9k and 10k Axles Without Bearings and Grease SealHi Jaime; if your axle was manufactured before July 2009 the # 8-288-3UC1 is the only option we have. If it was manufactured after April 2013 we have the # 008-430-03 which does not include the bearings or grease seal.
view full answer... - Can you Use the Dexter Trailer Idler Hub Assembly 9,000-lb-10,000-lb Axles on a Dual Wheel Set-Up?Hello Ronny, Yes, the Dexter Trailer Idler Hub Assembly for 9,000-lb to 10,000-lb Axles - 8 on 6-1/2 - Oil Bath # 8-288-3UC1 will work on a dual wheel set up. This hub assembly is designed for 9,000-lb to 10,000-lb general-duty Dexter axles manufactured before July 2009 and has an inner bearing 387A and outer bearing 25580. If you are not sure the specifications of your axle, please feel free to send me a picture of the axle tag. What kind of trailer are you working on?
view full answer... - Best Way to Convert Lippert 10K Axles to Disc BrakesYes, we have everything you need to convert the electric drum brakes on your 2014 Kaufman Car Wedge Trailer to electric over hydraulic disc brakes. In order to do this you are going to need disc brake assemblies, trailer hubs, brake lines, and an electric over hydraulic actuator. For the disc brake assemblies you will want to use the Kodiak Disc Brakes part # K2R1058D11DAC. You will need one kit per axle. For the trailer hubs you will want to use the Dexter Trailer Idler Hub Assembly...
view full answer... - Replacement Hub for 10k Dexter Drum with 9-44 MarkingYour Dexter Trailer Brake Drum # 9-44-1 is designed to fit the Dexter Trailer Idler Hub Assembly # 8-288-3UC1. This drum and hub installs on 9,000-lb to 10,000-lb general-duty Dexter axles made prior to July 2009.
view full answer...
- Availability of Spindle and Hubs for 10,000 lb Trailer AxleAs you may have noticed, the highest capacity spindle we carry is for a 7,000 lb axle, # TRU37FR. Your best bet is to source the spindles for a 10,000 lb axle through a local trailer shop or dealer. If are able to source the spindles, we do have hubs for 10,000 lb axles. I'll list them below: # 8-430-5UC3 - Dexter Hub Drum for 9K to 10K axles manufactured after July 2009 (for non ABS brakes) - uses inner bearing # 387A, outer bearing # 25580 and oil seal # 10-51 # K08-288-90 - Dexter...
view full answer... - Recommended Electric Over Hydraulic Trailer Brake Conversion for Dual 10K AxlesThe Disc Brake Kit # K2R1058D13 by Kodiak is the brake set that you will need to use for your 10,000 lb Dexter Torsion axles. When it comes to hardware, like the brake line, I recommend going with the HydraStar Hydraulic Brake Line Kit # HS496-252 which will wear better than other traditional brands. These lines are very flexible so the line is easy to maneuver under the trailer. The only downfall is that you cannot cut the line due to how hard and risky it is to do yourself. All you have...
view full answer... - Replacement Brake Assemblies for Dexter Trailer Hub 9-44Your Dexter Trailer Brake Drum # 9-44-1 is designed to fit the Dexter Trailer Idler Hub Assembly # 8-288-3UC1. This drum and hub installs on 9,000-lb to 10,000-lb general-duty Dexter axles made prior to July 2009. The Brake Assembly Set part # AKEBRK-10 would work great with this setup.
view full answer... - Replacement Hub Options For a Dexter D1012 With Bearings 387A and 25580Here is your options for a Dexter D1012 with the Inner Bearing # 387A, Inner Race # 382A, Outer Bearing # 25580, and Outer Race # 25520. Idler Hub Prior July 2009 # 8-288-3UC1 Idler Hub After April 2013 # 008-430-03 Hub/Drum Prior July 2009 # K08-288-90 Hub/Drum After July 2009 # 8-430-5UC3 All but the Idler Hub After April 2013 # 008-430-03 include all the bearings and seals. For this you will have to also add the following components for each hub. Inner Bearing # 387A Inner Race #...
view full answer... - What Is The Difference Between The Dexter Oil Hub 008-430-03 & The Dexter Trailer Hub 8-288-3UC1?The only difference between the: -Dexter Trailer Idler Hub Assembly for 9,000-lb to 10,000-lb Axles # 8-288-3UC1, & the, -Dexter Axle Oil Hub for 9,000-lb - 10,000-lb General Duty Axles # 008-430-03, is that # 008-430-03 is the new style, and is designed to work with 9,000 LB & 10,000 LB General Duty Axles After April 2013. Whereas, the Dexter Trailer Idler Hub Assembly for 9,000-lb to 10,000-lb Axles # 8-288-3UC1 is the old style, and is designed to work with 9,000-lb axles made after...
view full answer... - Recommended Complete Disc Brake Conversion System For 10,000 lb Dexter AxlesTo replace your leaking seals, you will want the Unitized Oil Seal # 10-51. This is a confirmed fit for your hubs. I've attached a video of an oil seal installation on a similar hub to help. For your disc brake conversion, you will need to use the Dexter Trailer Hub Assembly - 9,000-10,000-lb Axles - 8 on 6-1/2 - Oil Bath # 8-288-3UC1 and then the Kodiak Disc Brake Kit - 11" Rotor - 8 on 6-1/2 - Raw Finish - Leaf Spring - 10,000-lb Dexter # K2R1058D11E compatible with these hub assemblies...
view full answer... - Why Are My Oil Bath Hubs On A Ranger Boat Trailer Running HotWith what you have replaced, it can only be one or two things that is causing your issue. First will actually be the spindle. It may look good, but very minor imperfections can cause friction and may be what is going on. I would make sure the bearings are seating properly on the spindle and not "rocking" back and forth at all. I also highly recommend making sure the bearings are seating in the hub properly as well. If the races that the bearings sit in are a little off or if there is...
view full answer...
- How To Switch From Electric Drum Brakes To EOH Disc Brakes For 10k General Duty Dexter AxlesSince we don't know for sure what you axle is I do recommend first contacting Dexter and to try and confirm exactly what kind of axle you have. If you haven't really looked at them I do recommend getting under the trailer and trying to find a tag because it will make this process much easier. Assuming you have Dexter 10k general duty axles there will be two choices depending on the hub: Option 1: Kodiak Disc Brake Kit # K2R1058D11HD, which uses the Dexter Trailer Idler Hub Assembly...
view full answer... - Replacement Hub and Rotor for 3,500 lb Axle of Trailstar TrailerI am sure we can help replace all of the brake components but without a brand I can't really help pin point just the hub/rotor. Instead the best we could do is a kit that replaces the hub rotors, the mounting bracket, and the calipers. So you could use the part # K2HR35D and have a replacement for both sides of your axle and you'd be set. This has the correct capacity of 3,500 lb and bolt pattern of 5 on 4-1/2 inch.
view full answer...
- What Is the Proper Oil for Oil Bath Hubs on Trailer Axles?I recommend the Kodiak Synthetic Bearing Oil for Oil Bath Hubs - 8 oz Bottle # XLPROLUBE. It is a 90 weight synthetic oil. Dexter bought out Kodiak so this meets their specifications. I've also attached a photo of Dexter's recommended Oil Specs to assist.
view full answer...
- Why Are There Different Brake Drums for 9,000 and 10,000 lb Axles After July 1, 2009?The Dexter Trailer Hub/Drum Assembly # 8-430-5UC3 is a one piece assembly, hub and drum together. It fits Dexter 9k and 10k general duty axles made after 07/01/2009. Hub # 8-288-3UC1 is a 2 piece for 9K axle (after 10/89) and 10K axle (through 7/1/09). It does not come with the drum or mounting bolts. Dexter changed their spindle diameters on these two capacity (9,000 and 10,000 lb) axles. The biggest difference was in the inner diameter of the seal needed.
view full answer... - Do Oil Bath Trailer Hubs Require Grease Applied to BearingsYou do not need to grease bearings that go into an oil-bath hub like the Dexter 10k hub part # 8-288-3UC1. Filling the hub with oil like you mentioned would be all that's needed.
view full answer... - Can a 1-Piece 9K/10K Dexter Hub and Drum be Replaced with a 2-Piece 9K/10K Hub and DrumI spoke directly with my technical contact over at Dexter. Basically you cannot replace an 8-430 hub with an 8-288 hub due to differences in the spindles that each of those hubs fit. If your axle was made after July of 2009 then you will need to use # 8-430-5UC3. If it was made before July of 2009 you would instead use # 8-288-3UC1 with drum # 9-44-1 for non-ABS systems or # 9-44-3 for ABS systems.
view full answer... - Replacement Hubs and Bearing Parts For a Dexter 10,000LB General Duty Axle Prior To July 2009Your Dexter axle is a 10,000lb general duty axle that was manufactured on 1/31/01. That is all information I was able to obtain from Dexter due to the age of the axle. It will use either the Dexter Trailer Idler Hub # 8-288-3UC1 or the Dexter Trailer Hub and Drum Assembly # K08-288-90 with the Dexter Electric Brake Kit # 23-450-451. If you are looking for a bearing kit you will need to get the following components as we do not have a kit with everything you need. Inner Bearing # 387A Inner...
view full answer... - What is the Proper Way to Tighten the Nut on Your AxleTo tighten the spindle nut on the end of your spindle, go ahead and put your Hub Assembly, like part # 8-288-3UC1, on your spindle. Tighten it down to about hand tight and then back it off about 1/4 of a turn. Backing it off helps to keep everything from tightening up on you and keeps it so that the spindle won't heat up too much from pressure.
view full answer... - How to Determine if Kodiak Disc Brake Kit Will Fit Dexter Axle 10K HD AxleThe Kodiak Disc Brake Kit # K2R1058D11HD will fit your Dexter 10K HD axle if your axles uses the Dexter K08-288-91 hub, which we have as part # 8-288-3UC1 on our site. This hub uses a # 387A inner bearing, # 25580 outer bearing, and an oil seal with a 2.875" inner diameter. Attached are some review videos for you to check out.
view full answer... - Disc Brake Kit Availability for a Dexter 10k AxleThe Kodiak 10K Disc Brake Kit # K2R1058D11 is intended to allow conversion of a Dexter 8-288 idler hub for use with disc brakes. It is compatible ONLY with one specific hub, the Dexter hub 8-288 built between February 1990 and August 2009. What you can do is take off your hubs and measure the diameter of the spindle where the bearings and seal rides. If where the bearings ride is 2.250 and 1.750 and for the seal 2.875 this hub will fit. If your trailer already has disk brakes then you...
view full answer... - Recommended Replacement Hub And Drum For 10,000-Lb Dexter AxleThe hub assembly you need is part # 8-288-3UC1. This is the replacement hub for the Dexter old-style 2-piece hub and drums. This is designed for 10,000-lb axles, and includes the hub, bearings, races, seal, oil cap, wheel bolts, wheel retaining ring, and lug nuts. The drum that is designed to work with this is part # 9-44-1 for the non-ABS drum. If you need the ABS drum with exciter ring you will need part # 9-44-3. The mounting bolets are sold separately and they are part # 7-245....
view full answer...
Do you have a question about this Trailer Hubs and Drum?
Info for this part was:
Installed by:
Jeff D
Expert Research:
Jameson C
Expert Research:
Adam R
Expert Research:
Jeffrey L
Written by:
Laura H
Updated by:
Wilson B
Updated by:
Alexander C
Updated by:
Hannah L
Updated by:
Ryan F
At etrailer we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.
Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.
Error submitting comment. Please try again momentarily.