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  1. Trailer Hubs and Drums
  2. Redline
  3. 5 on 5 Inch
  4. For 3500 lbs Axles
  5. Idler Hub
  6. 13 Inch Wheel
  7. 14 Inch Wheel
  8. 14-1/2 Inch Wheel
  9. 15 Inch Wheel
Trailer Idler Hub Assembly for 3,500-lb Axles - 5 on 5 - Pre-Greased
etrailer Installation
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Redline

Trailer Idler Hub Assembly for 3,500-lb Axles - 5 on 5 - Pre-Greased

Part Number: 84550BX
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$66.31
Retail:$96.57
You Save: 31%
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etrailer Installation
We'll connect you with nearby partnered installers who know this exact setup.
Hub is designed for use on trailer idler axles. Fits 3,500-lb axles with #84 spindles. Inner bearing (L68149) and race, outer bearing (L44649) and race, grease seal, grease cap, wheel bolts, and lug nuts included. Pre-greased for easy installation. Great Prices for the best trailer hubs and drums from Redline. Trailer Idler Hub Assembly for 3,500-lb Axles - 5 on 5 - Pre-Greased part number 84550BX can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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  • Reviews (125)
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Redline Trailer Hubs and Drums - 84550BX

Highlights

  • Fits 3,500-lb Axles with #84 Spindles: Uses inner bearing L68149 and outer bearing L44649 for proper fit.
  • 5 on 5" Bolt Pattern: Works with 13"–15" trailer wheels for standard utility or boat setups.
  • Pre-Greased and Ready to Install: Bearings, races, seal, grease cap, wheel bolts, and lug nuts included.
  • 1,750-lb Capacity per Hub: Handles typical single- or tandem-axle trailer loads with confidence.
  • Built for Long-Term Use: Sturdy iron construction with lithium-complex (NLGI #2) wheel bearing grease.
Made in USA

Features to know about

Save Time with a Pre-Greased Assembly: Ready to Go Out of the Box

No need to mess with bearing grease right away. This hub assembly comes pre-packed with a lithium complex based (NLGI #2) wheel bearing grease that’s ready for use. The bearings and seals are already installed, so all you have to do is slide it onto your #84 spindle, tighten it down, and you’re ready to roll. It’s a simple, quick install that gets your trailer back in service without the cleanup.

Exploded view of a 5-bolt trailer hub assembly showing hub, bearings, seal, dust cap, and hardware, illustrating how the components fit together for trailer wheel installation.

Everything You Need in One Package: Complete Hub Assembly

This setup includes everything needed for a full hub swap—bearings, races, grease seal, grease cap, wheel bolts, and lug nuts. Each part is factory matched so it goes together smoothly. The hubs are built from sturdy iron for consistent performance under load, giving each hub a 1,750-lb weight capacity (3,500-lb per axle).

Set Up Once and Measure Right: Precision Fit for #84 Spindle

Finding the right fit is easy with its matched bearing pair—inner bearing L68149 (1.378" ID) and outer bearing L44649 (1.063" ID). That combo fits standard #84 spindles used on 3,500-lb axles. The included 58846 grease seal (1.719" ID / 2.565" OD) locks in your grease and keeps dirt out. Every dimension lines up exactly as needed for a snug, reliable fit.

Better Bolt Pattern Clarity: Straightforward Wheel Matchup

With a 5 on 5" bolt pattern and 1/2" studs, this hub works with wheels from 13" up to 15". If you’re checking what pattern you have, just measure between adjacent lugs—3" center-to-center means it’s 5 on 5". Clear specs like this make matching up new wheels or replacing old ones simple and accurate.

Solid Performance Mile After Mile: Built for Everyday Hauling

The iron construction and pre-installed races mean you get strength and stability from the start. Each hub face is machined flat for smooth wheel contact, keeping vibration low and wear even across your tires. Whether you’re putting together a new trailer or keeping one on standby as a spare, this pre-greased Redline hub is ready to handle steady use trip after trip.

Specs

Application and Capacity

  • Application: 3,500-lb trailer axles with #84 spindles
  • Weight capacity: 1,750 lbs

Wheel and Bolt Pattern

  • Wheel size: 13" to 15"
  • Bolt pattern: 5 on 5"
  • Wheel bolt diameter: 1/2"

Dimensions

  • Grease cap flange diameter: 1.986"

Bearing, Race, and Seal Information

  • Bearings (included):
    • Inner bearing: L68149 (1.378" inner diameter)
    • Outer bearing: L44649 (1.063" inner diameter)
  • Races (included):
    • Inner race: L68111
    • Outer race: L44610
  • Grease seal (included): 58846
    • Inner diameter: 1.719"
    • Outer diameter: 2.565"

Exploded view diagram showing all parts of a 5 on 5 trailer idler hub assembly for 3,500-lb axles, including bearings, races, grease seal, grease cap, studs, and lug nuts, arranged in assembly order.


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.

Center to Center
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).

Center to Outside Edge
Common configurations: 5 on 4.5" (most popular), 5 on 5", 5 on 4.75", 5 on 5.5"

K08-256-91 Trailer Idler Hub Assembly for 3.5K Axle with Hardware - 5 on 5 - Pre-Packed and Assembled

Replaces 84550UC1 and 84550BX





Customer Satisfaction Score:

Ratings & Reviews

4.7

125 reviews
Review sort icon
Hub is designed for use on trailer idler axles. Fits 3,500-lb axles with #84 spindles. Inner bearing (L68149) and race, outer bearing (L44649) and race, grease seal, grease cap, wheel bolts, and lug nuts included. Pre-greased for easy installation.

by:

Bolted on quickly and easily. Got upgraded shipping thrown in. Great place to order parts from!



by:

These folks are tops Fast shipping and if you have any trouble they fix it immediately.... what more could you ask for Good prices ?they got em



by:

Presently surprised that the hubs came pre-greased. Didn't say so when I ordered it. Worked out perfectly!



by:

The hub assembly worked great, I have been using it for a year now without any issues.

Thank you for helping me with this great product.

Ezequiel



by:

Quality hubs quality bearings Haley help me find what I needed very helpful knows what she’s doing you can find cheaper ones but read the reviews not so good thanks again E trailer and Haley



by:

That's a little sketchy on buying one at first but it literally fit like a glove, It was well packed and had new lug nuts as definitely well made so I ordered another one for the other side lol. THANK YOU. I definitely would do business with these people this is how it is done thank you very much! P.S the price is definitely worth it.



by:

Went on smooth, no issues so far, the cover was a little tough getting on, so I'm sure it'll be fun taking back off to grease. Still, I'd rather have a tight seal. Quality of the bearings, and hub seem to be above par.



by:

Quick shipping. Parts worked perfectly. Bearings included were cheap so I went to auto parts store and put better bearings in it.



by:

I thank you for taking time selecting the correct hub and barring assembly for my trailer. The hub arrived on time for me to make repairs and to go fishing the next day.



by:

Had a wheel bearing go out which took out the spindle and hub. This hub was the perfect replacement. Made the repair quick and easy.



by:

Shipping was much faster than expected. Customer service was excellent and a representative reached out to modify my order for faster delivery due to an item being back ordered. A replacement item was selected and everything arrived soon after order confirmation. All items arrived well packaged and exactly as I ordered it. I would definitely order from etrailer again.



by:

This was a complete kit, all the pieces were included and there were no surprises. This was part of an axle replacement, the entire job of bolting on the axle and the hubs took less than 2 hours. I chose this hub so that I can use the truck spare tire for the trailer, too.



by:

I needed to replace a hub with a 5x5 pattern. The only choice in this pattern was the star shaped hub. This seems to be a sturdy hub but I wish it was a full hub, seems heavy built though, time will tell if it holds up. I like that it comes complete with bearings, dust cap, seal and lug nuts.



by:

As always, eTrailer was great to work with in this recent order, but the quality of, at least one part in this kit, is really lacking. The easy lube axle cap, the one where the rubber cap inserts, is such thin metal that it deforms almost beyond use when attempting to insert it into the hub. I would have thought that this was the new "par for the course," except that I also ordered just the bearing rebuild kit, part no. DBRKHW35EZ, for my second axle on this trailer, the one with the brakes, and the replacement easy lube cap that came with this kit was almost twice the metal thickness and worked wonderfully without deformation. Given that this hub replacement is noted as the "Premium" replacement hub kit, I believe the cap should have been of usable thicker metal.



by:

Installed easily, glad it's pre-greased. Great deal! Shipping from etrailer was fast. Other websites didn't provide enough info to know if I was ordering the right part. etrailer did a good job of describing what was being purchased so they won my business.

Edgar profile picture

Edgar

3/22/2020

Its been a year, no complaints!



by:

Item arrived exactly as described, assembled, greased and ready to be installed. I literally took it out of the box, removed the plastic protective caps, and slipped it over the axle stub. It fit perfectly and works great. Very pleased with product cost, fast shipping and ease of installation.

Tregg G. profile picture

Tregg G.

6/18/2019

No issues what-so-ever. Working perfectly with no complaints.



by:

Perfect fit, great price and fast shipping. You cant go wrong with these guys.
My 12 year old utility trailer needed new bearings. It was just easier to buy new Complete hubs than hassle with removing seals and races and installing new ones. Plus Free shipping.

Cross profile picture

Cross

11/15/2020

Great product, perfect fit and fast delivery. Great company!



by:

Very nice to have this in the box ready to go for our long pocket cruising sailboat trailer over ten hours. I just replaced the bearings and packed them myself, and have an infrared thermometer to check the bearings at fuel stops, but if we do get into an issue on the road, this is an easy swap to ensure we aren't stranded on the side of the road.

Joseph profile picture

Joseph

8/13/2022

Still our backup, ready to go!



by:

Good morning Patrick
I receved the
hubs and it`s perfect thank you
I do with this parts , a copy of the Américaine Army trailer 416

Phil P. profile picture

Phil P.

3/17/2015

Thats an awesome trailer! Exactly what Id like to build to pull behind my JK. Im hoping these 5 on 5 hubs are the Jeep wheel pattern so I only need one spare?

Patrick B. profile picture

Patrick B.

4/7/2015

As long as the hubs/wheels on your JK are 5 lugs on a 5-1/2 inch pattern, these hubs should be fine. The only other thing to consider is the pilot hole on the wheel clearing around the center of the hub.


by:

I was looking for idler hub assemblies for my 6' x 12' utility trailer. Apparently 5 studs on 5" circle is not that common. Most trailers are 5 on 4.5. The entire experience with etrailer was great. They helped me with the selection of the idler hub assemblies and assured me I was selecting the correct hub assembly based on the bearing numbers that came out. The ordering was slick, especially with PayPal, and the least expensive delivery method was fast. Ordered them on a Thursday and UPS delivered them Monday morning. Excellent quality and a fair price. Will definitely use trailer.com again.



by:

SERVICE WAS GREAT AND THE PRICE WAS FAIR. ALTHOUGH WHEN COMPARED TO THE ORIGINAL HUBS , THESE HUBS ARE LIGHTER WEIGHT WITH LOWER QUALITY BEARINGS. THE ORIGINAL HUBS LASTED 36 YRS. I DON'T NEED THESE TO LAST THAT LONG. I WOULD HAVE PREFERED TO HAVE BOUGHT UPGRADED BEARINGS AS AN OPTION. THE 2 BOXES ARRIVED WITH A GOOD SIZED HOLE IN THE TOP BOX AND A COUPLE OF THE LUG NUTS, A WASHER, AND THE COTTER PIN WERE MISSING. THE GREASE CAP WITH THE HOLE WAS BENT OUT OF SHAPE. ALL IN ALL THESE ARE A GOOD PURCHASE. THEY WENT ON QUICK AND EASY, I HAD EVERYTHING I NEEDED INCLUDING THE CASTLE NUT. I AM GOING TO NEED 2 MORE HUBS I WILL DEFINATELY BUY 2 MORE OF THESE SOON.



by:

I selected this hub from several in my size available from etrailer.com as the description indicates the hub is made in USA. There were some a good bit cheaper and at least one that was more expensive so I thought this would be a quality US made hub. I was disappointed to find it proudly marked “Made in China” when it arrived and it appears to be the same as the ones available at local auto parts stores at a lower cost. All of which appear less robust than the original hubs on my trailer.
I wanted to use a different grease than the manufacturer had packed the bearings with so I had to remove the grease seal and bearings to clean out that grease. In my original hub the bearing races were easy to remove as the seat the race bottoms out on in the hub is low enough that a punch can be used to push out the race. In this new hub the seat for the inner bearing is as high as the entire race which will make it more difficult to replace the race in the future.
Once installed, the spindle nut was farther inside the hub cone when tight making it more difficult to get the cotter pin in. I had the washer behind the nut and the hub width is the same as the original hub so this hub may have the seats for the bearing races machined further into the hub. I did not try to measure and confirm that.
I have not used the trailer other than a test drive so far. Hopefully the hub will hold up just fine.
etrailer has always been great for me with a good selection of parts, help with selecting the correct parts if I need it, and fast getting orders sent out so I continue to be a happy customer.

Jeff profile picture

Jeff

8/16/2025

After about a year I have put over 2000 miles on the trailer, most of it highway miles in hot weather. No problems. I put new bearings in an old hub and carry as a spare now when traveling.



by:

Package has everything. I wasn’t sure if castle nuts and pins were included but they are. With several options. Highly recommend!



by:

Performing maintenance on a 23 year old trailer. The replacement hubs were an exact fit. Saved me the hassle of tracking down bearings, races and seals. Added benefit of new hubs, studs and lug nuts. These came pre packed with grease. Just added more grease and installed on the axle. If these last another 23 years, they will be perfect.

Robyn profile picture

Robyn

2/18/2021

After a year, the hubs are working well. Dont really have a lot of miles on them, but, they seem to be performing as well as the factory originals.



by:

This is the perfect setup for a hub replacement. So easy to just slide on pre lubed and packed and choose your fastening setup based on your axle. Definitely will get this setup again in the future for my other trailers.


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  • Pre-Greased Replacement 5-on-5 Hub for 3500-lb Dexter Axle
    You can confirm the weight rating of your Dexter axle by removing one hub and pulling its bearings. The included photo shows how part numbers usually appear on bearings. The specific bearings used will tell you the axle's weight rating. Just refer to the linked article that lists the bearings commonly used for various axle weight ratings. A new hub must use the same bearings as the original hub in order to fit on your spindles. A 3500-lb axle commonly uses bearings # L68149 and # L44649...
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  • Recommended Timbren Axle-Less System with 5 on 5 Bolt Pattern Hubs for Overland Trailer
    I have a solution for you, and it sounds like you're looking for a Timbren system that can be used with 5 on 5 hubs that would allow you to use Jeep wheels. Unfortunately the Timbren # ASR1200S03 spindle does not have any hubs with that bolt pattern, so instead you would need to use the Timbren Heavy-Duty Axle-Less Trailer Suspension - Straight Spindle - Regular Tires - 2,000 lbs # ASR2KHDS01. If you're looking for a lifted system, the Timbren Heavy-Duty Axle-Less Trailer Suspension - 4"...
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  • Trailer Axle Solution for Military Trailer with Jeep Wrangler Bolt Pattern
    For a hub that has a 5 on 5 inch bolt pattern to fit the spindles of the Timbren axle less kit part # ASR2KHDS03 which is great for applications like yours you would want the Trailer Hub part # 84550BX that you mentioned as well. This hub includes the bearings that the Timbren you referenced is designed to fit. This setup has a 4 inch lift and the hubs have the 5 on 5 inch Jeep bolt pattern.
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  • Replacement Axle Spindle for Dexter P21-SLR with 76 Inch Spring Seats and 44649 and 68149 Bearings
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  • Replacement Hub for Trailer with Bearings 68149 and 44649
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    The Dexter "8-256" is a hub assembly that uses an L68149 inner bearing and a L44649 outer bearing. This hub assembly was offered in a few different bolt patterns therefore you would need to confirm your bolt pattern using the attached help article and then choosing from the list below. 5 on 4-1/2" - part # 84545BX 5 on 4-3/4" - part # 845475UC1 5 on 5" - part # 84550BX 5 on 5-1/2" - part # 84555UC1
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  • Replacement Hub Needed for Dexter Axle 8-256
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  • Differences Between Trailer Idler Hubs With a 5 on 5 Bolt Pattern
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  • Can 17" Jeep Wheels W/ 5 on 5" Bolt Pattern Be Used On Off-Road Trailer?
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  • How to Choose Correct Idler Hub Replacement for Dexter Axle 8-256 Hub
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    view full answer...
    Image 1 for
  • Selecting Replacement Hubs and Wheels/Tires for 5 x 8-foot Utility Trailer
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    view full answer...
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  • What Spindle Will Work for Trailer Hub Assembly with L68149 Inner and L44649 Outer Bearings
    The Trailer Hub Assembly # 84550BX that you referenced will use # L68149 as the inner bearing and # L44649 as the outer bearing. These are the inner and outer bearings used by a # 84 spindle. We offer the following spindles: #84 Spindle for 3,500-lb Trailer Axles - 1-3/4" Diameter (11-1/4" OAL) # TRU84FR [R2061-284] #84 E-Z Lube Spindle w/ Brake Flange for 3,500-lb Trailer Axle - 1-3/4" Diameter (9" OAL) # TRU74FR [R20384EZ] #84 Spindle for 3,500-lb Trailer Axles - 1-3/4" Diameter (8-1/4"...
    view full answer...
  • Availability of Trailer Hub with 5 on 5 inch Bolt Pattern
    The only trailer hubs out there that have a 5 on 5 inch bolt pattern are for 3,500 lb trailer axles like the idler hub part # 84550BX.
    view full answer...


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Info for this part was:

Employee Lindsey S
Updated by:
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Employee Wilson B
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Employee Alexander C
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Alexander C
Employee Mike S
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Jameson C
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Expert Research:
Adam R
Employee Patrick B
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Patrick B
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Cole B
Employee Shane T
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Shane T
Employee Jacob T
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Jacob T
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Chris R
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Randy B
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