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Dexter Trailer Idler Hub Assembly for 6,000-lb Axles - 6 on 5-1/2

Dexter Trailer Idler Hub Assembly for 6,000-lb Axles - 6 on 5-1/2

Item # 42655UC1
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42655UC1 - 1/2 Inch Stud Dexter Axle Trailer Hubs and Drums
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Hub is designed for use on trailer idler axles. Fits 6,000-lb axles with #42 spindles. Inner bearing (25580) and race, outer bearing (15123) and race, grease seal, grease cap, wheel bolts, and lug nuts included. Lowest Prices for the best trailer hubs and drums from Dexter Axle. Dexter Trailer Idler Hub Assembly for 6,000-lb Axles - 6 on 5-1/2 part number 42655UC1 can be ordered online at etrailer.com or call 800-298-8924 for expert service.
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  • Reviews (12)
  • Q & A (178)
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  • Why etrailer?

Dexter Axle Trailer Hubs and Drums - 42655UC1

  • 6 on 5-1/2 Inch
  • For 6000 lbs Axles
  • Hub
  • Standard
  • 16 Inch Wheel
  • 16-1/2 Inch Wheel
  • 17 Inch Wheel
  • 17-1/2 Inch Wheel
  • 18 Inch Wheel
  • 18-1/2 Inch Wheel
  • Dexter Axle
  • 15123
  • 25580
  • 1/2 Inch Stud

Hub is designed for use on trailer idler axles. Fits 6,000-lb axles with #42 spindles. Inner bearing (25580) and race, outer bearing (15123) and race, grease seal, grease cap, wheel bolts, and lug nuts included.


  • Trailer hub assembly fits idler axles
    • Bearings, races, seal, grease cap, wheel bolts, and lug nuts are included
  • Sturdy iron construction
  • Hub and drum are made in the USA


  • Application: 6,000-lb trailer axles with #42 spindles
  • Wheel size: 16" to 18-1/2"
  • Bolt pattern: 6 on 5-1/2"
  • Grease cap flange diameter: 2.44"
  • Wheel bolt diameter: 1/2"
  • Weight capacity: 3,000 lbs

Bearing, Race, and Seal Information

  • Bearings (included)
    • Inner bearing: 25580 (1.75" inner diameter)
    • Outer bearing: 15123 (1.25" inner diameter)
  • Races (included)
    • Inner race: 25520
    • Outer race: 15245
  • Grease seal (included): 10-36
    • Inner diameter: 2.25"
    • Outer diameter: 3.376"

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"

K08-213-9C Dexter Trailer Idler Hub Assembly for 6K Axle with Hardware - 6 on 5-1/2

Replaces 42655UC1

Customer Reviews

Dexter Trailer Idler Hub Assembly for 6,000-lb Axles - 6 on 5-1/2 - 42655UC1

Average Customer Rating:  4.8 out of 5 stars   (12 Customer Reviews)

Hub is designed for use on trailer idler axles. Fits 6,000-lb axles with #42 spindles. Inner bearing (25580) and race, outer bearing (15123) and race, grease seal, grease cap, wheel bolts, and lug nuts included.

- 42655UC1


- 42655UC1

Still rolling. No complaints 340584

- 42655UC1

worked fine 282250

- 42655UC1

Product as expected, delivery sooner than expected, overall very good. Replaced old hubs on moblie home axles. Very easy to do. Great service. 230167

- 42655UC1

What a fast turn around 213291

- 42655UC1

Couldnt be happier with these hubs! First one I pulled out of the box, I just verified that the races were seated, and installed after packing the bearings. One hub out of the four had a damaged bearing and seal, but it was due to packing. No biggie, was able to "coerce" the bearing and seal to look "normal". Had all four corners done and back on the road in less than 4 hours, which included uninstall of old hubs, cleaning, packing and installing new parts. Quick shipping as well. eTrailer is a great place to shop! 176900

- 42655UC1

Very helpful and pleasant purchase expe rience. 141220

- 42655UC1

very good 139645

- 42655UC1

Great service and fast shipping - Ricky was a big help making sure that everything fit together - thanks a lot! 129106

- 42655UC1

I've not have a chance to use them. 120620

- 42655UC1

I used 42655UC1 hubs on mobile home axles just required different size seal to fit spindle, great product & you guys were very helpful with helping find a hub that would fit,very pleased with this product and service. 45032

- 42655UC1

Good Experiene Website laid out good, when ordering, it showed me what products went together instead of searching to find out like which hub goes to what axle and vise versa. Fast shipping and good products. Recommend them to anyone and everyone looking for trailer parts. 4231


Ask the Experts about this Dexter Axle Trailer Hubs and Drums

  • Replacement Brake Assemblies and Hub Drums for 3500 lb Axle
    Given the bearing numbers you provided, you have a typical 3500 lb axle which uses a 10 inch brake assembly. I'd recommend going with a self adjusting brake assembly like # AKEBRK-35-SA which includes a left and right assembly. The mounting hardware is available separately as # BRKH10B. I'd also suggest taking a look at the armature surface of the brake drum that your brake magnet rides against. If it's grooved at all, you'll want to replace it as the magnet won't get the best grab...
    view full answer...
  • Can I Upgrade from 6 Lug to 8 Lug Wheels to Help Increase Weight Rating of my Trailer?
    Because the total weight capacity of your trailer is limited by the lowest rated component, your axle capacity won't be increased by adding hubs with more lug nuts to the equation-even if they are rated higher than the axle. Moving to 8-lug hubs sounds like you want to move from 5,200-lb axles up to 7000-lb axles. If this is the case, then we have a few options for you listed below; I've also linked below all of the 7000-lb axles we currently have available. Best Upgrade: Timbren Axle-Less...
    view full answer...
  • 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...
  • How Can I Identify an Axle Without a Sticker?
    Thank you for the pictures! It looks like you've got some sort of square drop axle on your trailer and if you can't find an identifying sticker, I can still help you figure out what you've got so that you can make the swap to electric brakes on your trailer. It looks like you've got 6 bolts on the wheels, which can help narrow down our search, but we'll need to know what size the brakes on the trailer are and if possible, what size (or number) the inner and outer bearings are on the...
    view full answer...
  • Wheel and Tire for Tandem Trailer with GVWR of 16,450 lbs
    While we can't order you in the axle you are needing we can help with the wheels and tires. For the weight capacity you are going to need our best option is a 215/75R17.5 wheel and tire like the part # TTWA215H-175WM which has a weight capacity of 4,805 lb per wheel/tire. This has a bolt pattern of 8 on 6-1/2 inch which would be the bolt pattern the drums you'd order would have but you might double check when you order the axle just to be sure. Due to the spring seat dimensions you...
    view full answer...
  • Replacement Wheel Stud for 3,500 lb Axle Hub
    Most likely you have a Dexter 3,500 lb hub which uses basically the standard wheel studs as other 3,500 lb hubs as well. So the correct replacement wheel stud would then be the part # 7-122.
    view full answer...
  • Easy Way to Determine Dexter Axle Diameter by Measuring
    The quickest way we can help you determine your Dexter axle capacity is going to be to measure the diameter of it. I can email them your serial number and they'll get back to me hopefully quickly but if measure your diameter you'll know immediately: Typical Axle Diameters Based on Axle Capacity - 1,000-lb - 2,000-lb Axles: 1-1/2 inch - 1-3/4 inch diameter - 3,500-lb Axles: 2-3/8 inch diameter - 5,200-lb - 7,200-lb Axles: 3 inch diameter - 8,000-lb Axles: 3-1/2 inch diameter - 9,000-lb...
    view full answer...
  • Spindle Recommendation for Trailer with 3 Inch Round Axle with 4 on 4 Wheel Bolt Pattern
    Technically, any of our spindles can be welded on the end of your 3 inch diameter axle. However, the 4 on 4 hubs indicate a lower weight capacity. So, if you're wanting to keep the 4 on 4 bolt pattern and reuse your existing wheels, the only option is the BTR E-Z Lube Spindle w/ Brake Flange # TRU27FR. This spindle is designed for 2,500 lb axles and will allow you to use industry standard hubs # 8-173-16UC3. This means that you won't have any issues finding replacement or maintenance...
    view full answer...
  • Upgrading Underrated Axles on 31-4BH Coleman Lantern Travel Trailer
    If I'm reading you correctly, your travel trailer has a GVWR of 10K, but has two 3500 axles? If that's the case, your axles are horrifically overloaded and should be upgraded. Installing 12 inch brake assemblies (which likely wouldn't work because the available 12 inch drums would use a different bearing set than a 3500 lb axle) would provide better braking, but wouldn't fix the fact that the axles are underrated. Your best course of action would be to replace your current axles with...
    view full answer...
  • Can a Spindle be Replaced on a 7,000 Pound Trailer Axle
    You are describing a spindle like # R50342EZ but it uses a tang washer, not a cotter pin because of the grease fitting. The problem is that aftermarket spindles are under rated compared to the OEM counterparts. This is actually not a bad thing because cutting off the old spindle and welding on a new one is a specialized job. If not done right it could cause tire wear problems, trouble with the suspension, tracking and sway problems and so on. It would be better to replace the axle. We...
    view full answer...
  • How to Determine Axle Capacity Based on Axle Diameter
    There are also some typical axle dimensions/capacities. Typical Axle Diameters Based on Axle Capacity: 1,000-lb - 2,000-lb Axles: 1-1/2" - 1-3/4" diameter 3,500-lb Axles: 2-3/8" or 3" diameter (Can have a 3-1/2" diameter, but rarely) 5,200-lb - 7,200-lb Axles: 3" diameter 8,000-lb Axles: 3-1/2" diameter 9,000 lb Axles: 4" diameter 10,000-lb Or more axles: 5" diameter The diameter of the axle should be the same all the way throughout unless you are also considering the spring...
    view full answer...
  • Replacement Hub Recommendation for a Calkins Boat Trailer
    The bolt pattern is helpful information for picking out the correct replacement hub, but you need more info. You will want to remove your current hub to get the bearing numbers off of the bearings in your hub. With that info I can help you pick out the correct hubs. If you cannot see the part numbers on the bearings or grease seal, then you can take a few measurements on your spindles. I recommend using a precise measuring tool such as a dial caliper because these measurements will...
    view full answer...
  • Determining Axle Weight Capacity of 3 inch Axles
    Typically axles with a 3 inch diameter have a range of weight capacity ranging from 5,200 to 7,200 pounds. This is the weight capacity of each axle. Therefore, you camper trailer axles could have a combined weight capacity ranging from 10,400 to 14,400 pounds. Please keep in mind that this is an approximate weight axle range and your specific trailer axles may be different, especially considering the age of your trailer. I have also included some helpful articles that might of beneficial...
    view full answer...
  • How to Determine Square Axle Trailer Capacity
    Square axle capacities are pretty hard to determine. Unlike round axles, they do not have set capacities based on their dimensions. But what you can do is give me some exact measurements of your spindle and we should be able to see if there is a hub we carry that would fit so that you could at least get a ballpark on your capacity. Bearing numbers would work as well. Near the coupler of the trailer there should be a plate or sticker that would have the VIN. There should be capacities...
    view full answer...
  • How to Determine Dexter Axle Weight Capacity
    I reached out to my contact at Dexter and they don't have any information based on that serial number in their system. They recommended taking off one of the wheels and on the hub there will be a number that starts with 8 followed by a dash and then 3 more numbers. We can help with axle capacity based on that number. As far as camber, all through axles will have a slight bow in the middle which would appear to be a camber when unloaded but they do even out when under load so there...
    view full answer...
  • Tips for How to Identify a Trailer Axle
    Depending on how the trailer was made, there will be a few spots you can check to identify the axle. First, if the trailer was pre-made by a specific company, you may be able to find this information in either the paperwork or on a placard somewhere on the frame. Sometimes, the axle identity is stamped into the axle itself or into the hub if it was purchased as a complete assembly. If you cannot find any markings or notation for the axle, you will need to look for replacement parts...
    view full answer...
  • Is a Axle Stamped with D80 an Dexter 8k Rated Axle
    The D80 you mentioned in the info you found indicates that you do have a Dexter 8k axle. If you are looking for a replacement hub for this axle the part # 8-287-14UC1 is a 8k rated Dexter hub designed to fit that spindle.
    view full answer...
  • How To Determine Trailer Axle Weight Capacity And Replacement Hub Components
    Depending on the age and condition of the trailer, it may have a sticker or plate that has the weight capacity of the trailer listed. If you aren't able to find a sticker or plate, you can determine the weight capacity of your axle by using a precision tool like part # PTW80157. Here are the typical axle diameters between the hubs based on axle capacity. You will need to measure the axle beam. the tire does not actually have to be removed for that. - 1,000-lb - 2,000-lb Axles: 1-1/2...
    view full answer...
  • What is the Weight Capacity of a Dexter SLR P16 Axle
    If you can read me the serial number on the axle I can then call the manufacturer, Dexter, and find out the weight capacity but if not you can measure the diameter and use the chart below to determine axle capacity. The "P16" is the plant it was made. - 1,000-lb - 2,000-lb Axles: 1-1/2 inch - 1-3/4 inch diameter - 3,500-lb Axles: 2-3/8 inch diameter - 6,000-lb - 7,200-lb Axles: 3 inch diameter - 8,000-lb Axles: 3-1/2 inch diameter - 9,000-lb Axles: 4 inch diameter - 10,000-lb +...
    view full answer...
  • Replacement Brake Assemblies for 1997 Fleetwood Mallard
    Your 1997 Fleetwood Mallard uses standard brake assemblies and hubs. To remove the hub, you will need to remove the spindle nut and then pull the hub/drum assembly off the spindle to access the brake assembly. If the hubs have been on for a long time sometimes using a rubber mallet around the edges of the drum will help get it to move more easily. If you have 12 inch diameter brake assemblies, then you will want assembly # AKEBRK-7-SA. If you have 10 inch diameter assemblies you...
    view full answer...
  • How to Determine Square and Round Tube Axle Capacity
    Looks like you found the chart that Jeff D made that shows common axle capacities based on diameter: Typical Axle Diameters Based on Axle Capacity - 1,000-lb - 2,000-lb Axles: 1-1/2 inch - 1-3/4 inch diameter - 3,500-lb Axles: 2-3/8 inch diameter - 6,000-lb - 7,200-lb Axles: 3 inch diameter - 8,000-lb Axles: 3-1/2 inch diameter - 9,000-lb Axles: 4 inch diameter - 10,000-lb Or more axles: 5 inch diameter These capacities are for round axles. Square axle capacities are...
    view full answer...
  • How to Determine the Weight Capacity of a Dexter Hub and Axle
    Based on your bearing dimensions, I think Dexter meant to say that the replacement hub for you is a 6-lug hub rated for a 5,200 lb axle, not that it is a 5,200 lb hub. Your axle is likely rated for 5,200 lbs, especially since the axle tubing has a 3-1/2 inch diameter. I have not heard of a hub with a 6-lug bolt pattern for a 10,000 lb axle or a 10,000 lb axle with 3-1/2 inch diameter tubing. The Dexter Hub Assembly, # 42655UC1, that you referenced is likely going to be the hub that...
    view full answer...
  • Is a 2-3/8 inch Diameter Axle a 3,500 lb Capacity Axle
    2-3/8 inch diameter axles are 3,500 lb axles. If you happen to be looking for a replacement 3,500 lb hub we have several at the attached link. The most popular being the part # AKHD-545-35-EZ-K.
    view full answer...
  • Determining Diameter of Axle on 2007 Jayco Octane Toy Hauler
    Sounds like you are trying to determine the diameter of your trailer axle. Measuring an axle, especially a round one, can be difficult. I recommend using a set of dial or digital calipers to get an accurate measurement. Typical Axle Diameters Based on Axle Capacity 1,000-lb - 2,000-lb Axles: 1-1/2" - 1-3/4" diameter 3,500-lb Axles: 2-3/8" diameter (can have a 3-1/2" diameter, but rarely) 6,000-lb - 7,200-lb Axles: 3" diameter 8,000-lb Axles: 3-1/2" diameter 9,000-lb Axles: 4"...
    view full answer...
  • Upgrading From A Single Axle To A Tandem Axle Trailer
    First of all I'm sorry to hear the inconvenience you're going through here. A new trailer designed to accommodate a boat your size is really your best solution and is my recommendation. To add a second axle to an existing single-axle trailer you could do so however the the frame of the trailer, coupler, suspension, etc all have individual weight ratings and you have to go with the lowest rated component as the overall weight capacity. The attached help article provides a solid starting...
    view full answer...

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Info for this part was:

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