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Dexter Trailer Idler Hub Assembly for 2,200-lb Axles - 5 on 4-1/2 - Galvanized

Dexter Trailer Idler Hub Assembly for 2,200-lb Axles - 5 on 4-1/2 - Galvanized

Item # 8-259-50UC1
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Dexter Axle Hub - 8-259-50UC1
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Galvanized idler hub assembly is great for marine use. Trailer hub fits 2,200-lb idler axles with BTR spindles. Inner bearing (L44649) and race, outer bearing (L44649) and race, grease seal, grease cap, and galvanized lug nuts included. Lowest Prices for the best trailer hubs and drums from Dexter Axle. Dexter Trailer Idler Hub Assembly for 2,200-lb Axles - 5 on 4-1/2 - Galvanized part number 8-259-50UC1 can be ordered online at etrailer.com or call 800-298-1624 for expert service.
  • All Info
  • Reviews (20)
  • Q & A (11)
  • Photos
  • Why etrailer?

Dexter Axle Trailer Hubs and Drums - 8-259-50UC1

  • 5 on 4-1/2 Inch
  • For 2200 lbs Axles
  • Hub
  • Standard
  • 10 Inch Wheel
  • 12 Inch Wheel
  • L44649
  • 1/2 Inch Stud
  • L44649
  • Dexter Axle

Galvanized idler hub assembly is great for marine use. Trailer hub fits 2,200-lb idler axles with BTR spindles. Inner bearing (L44649) and race, outer bearing (L44649) and race, grease seal, grease cap, and galvanized lug nuts included.


  • Marine-grade trailer hub assembly fits idler axles
    • Includes bearings, races, grease seal, grease cap, and zinc-coated lug nuts
  • Zinc plating has a 500-hour salt spray rating
    • Ideal for use on a boat or snowmobile trailer
    • Durable enough for saltwater applications
  • Hub is made in the USA


  • Application: 2,200-lb axles with BTR spindles
  • Wheel size: 10" to 12"
  • Bolt pattern: 5 on 4-1/2"
  • Hub flange diameter: 5-1/2"
  • Wheel bolt diameter: 1/2"
  • Grease cap flange diameter: 1.986"
  • Weight capacity: 1,100 lbs

Note: Some axles rated at 2,200 lbs require a different seal and bearings. Be sure that the bearings in the hub being replaced have L44649 stamped on them. If the bearings have L44643 stamped on them, use 34822545BX trailer hub.

Note: Trailer wheels that are smaller than 15" and have 5 bolts, have a 5 on 4-1/2" bolt pattern.

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"

Corrosion Resistance for Marine Use

This trailer hub assembly has a zinc coating that resists corrosion, making it ideal for use on your boat or snowmobile trailer. All GAL-DEX hubs undergo a test in which they are sprayed with a 5-percent salt solution to determine corrosion resistance over time. These products are able to withstand 500 hours of constant exposure to the saltwater mist. This 500-hour salt spray rating indicates that a product is not only durable enough to last in freshwater environments, but it can also be used on trailers that come into contact with saltwater.

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"

K08-259-92 Dexter Trailer Idler Hub Assembly for 2.2K Axle with Hardware - 5 on 4-1/2 - L44649 Bearings

Customer Reviews

Dexter Trailer Idler Hub Assembly for 2,200-lb Axles - 5 on 4-1/2 - Galvanized - 8-259-50UC1

Average Customer Rating:  5.0 out of 5 stars   (20 Customer Reviews)

Galvanized idler hub assembly is great for marine use. Trailer hub fits 2,200-lb idler axles with BTR spindles. Inner bearing (L44649) and race, outer bearing (L44649) and race, grease seal, grease cap, and galvanized lug nuts included.

- 8-259-50UC1

Just what I needed to replace the original worn out hubs on my small trailer. Parts arrived quickly in great condition and were a direct replacement. These hubs are actually better than the original hubs, they are galvanized not painted and will better protect from rusting, they also came with 1/2-20 threaded studs compared with threaded bolts on the original hubs. The idler hubs also came with all the required components to repair my small trailer.

- 8-259-50UC1

I have not yet installed them but have unpacked and took measurements. The only issue I have is the grease seal ID is .25 to large but that is most likely my fault during the order, I have the right size grease seals coming. The hub is solid and the bearings fit real nice, no slop. This is for a boat trailer which goes back and forth to a very rural camp so it gets bounced around a lot, time will tell how these hold up. The original hub and bearings are ok and will be my field spare should I need it, slip one hub off and the other on, tighten and go. I like the stud with lug nut to hold the rim rather than original bolt into the hub, easier for tire mounting and I can put a locking lug nut on as well, personal preference. This seemed to be the most cost effective means, all one package, just watch the size of the individual parts to make sure you get all the parts the correct size. etrailer.com packed the parts well, nothing flopping around or damaged. No complaints, now the dirty part, replacing the old with new.

Still on the trailer and working out well. I have put some hard miles on them and they seem to be holding up. Just shot some grease in them before the next trip.
Gary B - 07/15/2018

- 8-259-50UC1

Very responsive would definitely order again!!

- 8-259-50UC1

These are very well constructed and etrailer does a good job at putting together a kit that contains everything you need. You will have to keep though your old washer, nut, and pin. Make sure you are ordering not only the right size of bearings, but also the grease seal. Some not-so-standard hubs have mismatched seal sizes. Measure your spindle and your seal seat. If your spindle is larger in diameter than the 1” (1.058”) this is the right kit for you. But also measure your seal seat. This kit shipped with a seal that fits a seat that’s 1.5” in diameter. If Yours is closer to 1 ¼” you are going to need a different seal. etrailer quickly rushed out those for me!

- 8-259-50UC1

I received my hubs last week, shipping was nice and fast, and I installed them over the weekend. Kits were complete and everything fit perfectly. The only negative comment I would make is that the hubs do not look like they do in the video or picture. Instead of a "round" shape hub, they are a "star" shape hub, which made me think I had received the wrong ones. Once I pulled off my old ones and checked all the measurements I realized the difference between the two was purely cosmetic. Very happy!

- 8-259-50UC1

Fit perfectly, only had to buy a set of grease seals as my Hobie trailer had smaller hubs (1 1/4 vs the 1 1/2") that would not be compatible with the grease seals provided

- 8-259-50UC1

This worked great on our boat trailer

- 8-259-50UC1

High quality parts, exact fit. Great value product that arrived quickly and installed easily. Bought these for a new to me pontoon trailer.

- 8-259-50UC1

Kit was quality and functioned properly, no problems as of 1 year later.

- 8-259-50UC1

Bought new hubs/bearings for my Shorelandr boat trailer. Ricky in customer service was most patient helping me pick the proper parts. Got the hubs Monday am, installed them Monday afternoon, piece of cake!

- 8-259-50UC1

Fit perfectly, only had to buy a set of grease seals as my Hobie trailer had smaller hubs (1 1/4 vs the 1 1/2") that would not be compatible with the grease seals provided

- 8-259-50UC1

Purchased a hub assembly for a trailer and a wheel and rim. Excellent quality products and very rapid delivery. Very good product info on the website

- 8-259-50UC1

Hubs used on ssnowmobile trailer. Held up well through winter #1. Galv coating still looks good.

- 8-259-50UC1

Great products and prices. Very fast shipping. But best of all, incredible instructional videos.

- 8-259-50UC1

Extremely fast arrival. Great to know I can get trailer parts at a great value.

- 8-259-50UC1

Excellent product. Fast shipping . Will do business again

- 8-259-50UC1

Quick delivery and great customer service. Have yet to install, but quality looks good.

- 8-259-50UC1

One hub on, one hub to go!! Really nice quality....from a great e-retailer!!

- 8-259-50UC1

Product as described attentive customer service

- 8-259-50UC1

Fast shipping prompt service great product and company


Ask the Experts about this Dexter Axle Trailer Hubs and Drums

  • Selecting Replacement Hubs for 1963 Travel Trailer
    Thank you for the information from your vintage travel trailer's existing hub assembly. This is likely a casting number and will not give us what we need to find you correct replacement hubs, but it is not hard to determine correct new hubs. You will definitely want to replace both hubs. Things you need to match up are the hub bolt pattern, the axle weight rating and the bearing numbers. The linked article will help you with identifying the bolt pattern, the axle should have a sticker...
    view full answer...
    Image 1 for
  • Replacement Hubs for 1994 Coleman Destiny Pop-Up Camper Trailer
    Thank you for providing the details about your 1994 Coleman Destiny's axle and hubs. It is often a lot easier to just replace the complete hub than to pry out the old bearings and races and to re-install everything. New hubs also give you the confidence that comes from knowing all your components are new and in good shape. On the page I linked you can view all compatible idler hubs in your 5-on-4-1/2 bolt pattern that are rated for a 2200-lb axle. All of these idler hubs use your L44649...
    view full answer...
  • Replacement Hubs for 2000 Coleman Sedona
    Sometimes the numbers wear off of the bearings in trailer hubs but what you can do instead is use the diameter of the spindle where the bearings ride to determine what would be correct replacement. Use this picture as a guide and let me know what you have and I'll help: https://images.etrailer.com/static/images/pics/q/u/qu87803_800.jpg
    view full answer...
    Image 1 for
  • Recommended Hub Assemblies and Bearing Buddies for SeaDoo Trailer
    Thanks for the information you gave. I recommend the Trailer Hub Assembly for 8" to 12" Wheels - 5 on 4-1/2 with GAL-DEX Coating # 8-259-50UC1. These Dexter assemblies have a galvanized coating to assist since your trailer is going to be used in water. You may also want to consider the Bearing Buddy Bearing Protectors - Model 1980A-SS w/ Auto Check - Stainless Steel (Pair) # BB1980A-SS which will protect your bearings while submerged in water or salt water. These have a built in grease...
    view full answer...
  • Replacement Hub for 1989 Ranger Trailer
    Judging by your photo, your trailer would use an idler hub, not a hub drum. Assuming you have 5 lug on 4-1/2 inch bolt circle wheels that use an # L44649 inner and outer wheel bearing, you have a few choices. Rather than the painted hub, I'd recommend going with a galvanized hub for greater corrosion resistance. Dexter hubs are manufactured in the US, which is what I'd recommend. For an 8, 10 or a 12 inch wheel, use # 8-259-50UC1 for a standard spindle or # 8-259-50UC1-EZ for the EZ...
    view full answer...
    Image 1 for
  • 5 Lug Hub That Can Fit Spindle with BTR Dimensions
    Thanks for the picture you included that has the dimensions of your spindle. Based on that you do have a BTR spindle so for a hub with the 5 lug bolt pattern you wan you'd need the # 8-259-50UC1 and you'd be set. Your spindle not having a grease fitting is also not a big deal at all. That does not affect the fit of the hub to the spindle at all.
    view full answer...
    Image 1 for
  • Looking for Replacement Hubs for Boat Trailer with 1.06 Inch Diameter Spindles
    Since you successfully measured your spindles, it sounds like you might have a digital caliper lying around somewhere. Measure the hub bore (inside diameter of hub where grease cap sits). If this diameter is 1.98 inches, your existing bearings are # L44649, in which case the # 8-258-5UC1 hub you referenced would indeed be a correct replacement. Since the hubs are going on a boat trailer, I'd recommend you use galvanized hubs like part # 8-259-50UC1. The hubs are identical to the ones...
    view full answer...
  • Where To Find Numbers For Replacement Bearings On Utility Trailer
    Since the axle you have is a Dexter Model 8259 you can choose one of the hub assemblies we offer from the attached product page. If you have an EZ-Lube axle on your trailer you may want to check out part # 8-259-5UC1-EZ, or part # 8-259-50UC1-EZ. If you do not have an EZ-Lube axle take a look at part # 8-259-5UC1 or part # 8-259-50UC1. I have attached links to some product review videos for these kits you can take a look at.
    view full answer...
    Image 1 for
  • Replacement Hubs/Wheel Studs/Bearings Races for Triton Triton XT14-101-1 Trailer
    In order to spec the correct replacement wheel studs, I'd need the dimensions from one of your existing wheel studs, as shown in the provided diagram. I spoke with the nice folks at Triton Trailers to find the specifics about your existing hubs. For a replacement hub, I'd recommend part # 8-259-50UC1 which is compatible with a 2200 lb axle. The hub has a galvanized finish to resist corrosion, and includes the inner and outer L44649 wheel bearing, and has the L44610 races pre-installed....
    view full answer...
    Image 1 for
  • Looking for Galvanized 4 Lug Trailer Hub Compatible w/ # T20BTR-6048 Dexter Trailer Axle
    The # T20BTR-6048 Dexter 2K axle you referred to is compatible with a L44649 inner and outer wheel bearing. The # 8-91-05UC1 hub assembly has a 4-on-4 bolt pattern and uses the L44649 bearings. A galvanized version isn't offered, but there's one available in a 5 lug on 4-1/2 bolt circle, part # 8-259-50UC1 for 8-12 inch wheels or # 8-258-50UC1 for 13-15 inch wheels. Keep in mind, if you switched to the 5 lug hub, you'd need to swap out your existing wheels for wheels with a 5-on-4-1/2 inch...
    view full answer...
  • Replacement Hub and Bearing Recommendations for Trailer Hub with L44649 Bearings
    Since both of your bearings are # L44649 you would want a coated hub like the part # 8-259-50UC1 since this is for a boat trailer. This hub has a Gal-Dex coating to fight corrosion. This hub has a 5 on 4-1/2 inch bolt pattern. If instead you have 4 on 4 inch bolt pattern you would want the part # 8-91-05UC1-EZ. Or for just the bearings you would want the part # L44649 that I mentioned. Or for a bearing kit with new seals and races you would want part # BK1-150. The included seal is...
    view full answer...

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Info for this part was:

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