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  1. Trailer Hubs and Drums
  2. Dexter Axle
  3. 8 on 6-1/2 Inch
  4. For 5200 lbs Axles
  5. For 6000 lbs Axles
  6. For 7000 lbs Axles
Trailer Hub for 5,200-lb to 7,000-lb Axles - 8 on 6-1/2 - Galvanized

Trailer Hub for 5,200-lb to 7,000-lb Axles - 8 on 6-1/2 - Galvanized

Item # 8-231-50
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Trailer Hubs and Drums
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Shipping Weight: 20 lbs
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Galvanized finish is great for marine use. Trailer hub fits 5,200-lb, 6,000-lb, and 7,000-lb idler axles. Inner and outer races included. Bearings, grease seal, grease cap, and lug nuts sold separately. Lowest Prices for the best trailer hubs and drums from Dexter Axle. Trailer Hub for 5,200-lb to 7,000-lb Axles - 8 on 6-1/2 - Galvanized part number 8-231-50 can be ordered online at or call 1-800-940-8924 for expert service.
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Dexter Axle Trailer Hubs and Drums - 8-231-50

  • 8 on 6-1/2 Inch
  • For 5200 lbs Axles
  • For 6000 lbs Axles
  • For 7000 lbs Axles
  • Hub
  • Standard
  • 16 Inch Wheel
  • 16-1/2 Inch Wheel
  • 17 Inch Wheel
  • 17-1/2 Inch Wheel
  • 1/2 Inch Stud
  • 14125A
  • 25580
  • Dexter Axle

Galvanized finish is great for marine use. Trailer hub fits 5,200-lb, 6,000-lb, and 7,000-lb idler axles. Inner and outer races included. Bearings, grease seal, grease cap, and lug nuts sold separately.


  • Marine-grade trailer hub fits idler axles
    • Includes inner and outer races
    • Requires bearings, grease seal, grease cap, and lug nuts (sold separately)
  • Zinc plating has a 500-hour salt spray rating
    • Ideal for use on a boat or snowmobile trailer
    • Durable enough for saltwater applications


  • Application: 5,200-lb, 6,000-lb, and 7,000-lb axles
  • Bolt pattern: 8 on 6-1/2"
  • Wheel studs: 1/2" diameter x 2-1/4" long
  • Weight capacity: 3,500 lbs

Bearing, Race, and Seal Information

  • Bearings (sold separately)
    • Inner bearing: 25580 (1.75" inner diameter)
    • Outer bearing: 14125A (1.25" inner diameter)
  • Races (included)
    • Inner race: 25520
    • Outer race: 14276
  • Grease seal (sold separately): 10-10 or 10-36

Corrosion Resistance for Marine Use

This trailer hub 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"

8-231-50 Dexter GAL-DEX Trailer Hub with Races for 5,200 Pound, 6,000 Pound, and 7,000 Pound Axles

Video of Trailer Hub for 5,200-lb to 7,000-lb Axles - 8 on 6-1/2 - Galvanized

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.

Video Transcript for Dexter Trailer Hubs and Drums - Hub - 8-231-50 Review

Today we're going to review part number 8-231-50. This is the Dexter Trailer Hub for 5,200 lb to 7,000 lb axles. As you can see it is an 8 on 6 1/2" bolt pattern and has the GAL-DEX finish on it. Basically this is a galvanized marine-grade trailer hub which will fit on Idler axles. It does include the inner and outer bearing races which are press-fit in there already, but it does not include any of the bearings, the grease seal, the grease cap, or the lug nuts. Those are all sold separately.

We do sell them on our website and if you go to the product page for this hub, it will list all those part numbers you would need. This trailer hub has GAL-DEX zinc coating that will resist corrosion. Makes it ideal for use on your boat or snowmobile trailer, and it's durable enough for saltwater applications. All of the GAL-DEX hubs are able to withstand 500 hours of constant exposure to the saltwater mist. This 500 hour salt spray rating will indicate that this product is not only durable enough to use in freshwater environments, but it also could be used on trailers in a saltwater environment. Now again, the application on this hub is 5,200 lb axles, 6,000 lb axles, and 7,000 lb axles.

The bolt pattern is 8 on 6 1/2". The wheel stud's diameter is 1/2". Weight capacity on one of these hubs is 3,500 lb, so one matched with one on the other side on the axle will get you your maximum of 7,000 lb. Again, the bearings, the grease seal, the grease cap, and the lug nuts are all sold separately. That should do it for the review on part number 8-231-50, the Dexter Trailer Hub for 5,200 lb to 7,000 lb axles with the 8 on 6 1/2" bolt pattern.



Ask the Experts about this Dexter Axle Trailer Hubs and Drums

  • Difference Between Trailer Hubs that are Lug Centric and Hub Centric
    It is easy to tell which type of wheel you have on your boat trailer. Lug centric wheels slide onto studs on the hub and are secured with lug nuts, like a car tire. If a wheel is hub centric, the wheel centers on the hub and bolts are threaded into the hub to secure the wheel. Every one of the hubs we offer with an 8 on 6-1/2 inch bolt pattern is lug-centric. See attached link to see them all.
    view full answer...
  • Grease Leaking from E-Z Lube Spindle and Hub
    There are a couple things that may be causing an E-Z Lube spindle to leak grease. There could be a bit too much grease # L11390 and the excess is coming out, or the grease cap or grease seal of a hub like # 8-231-50UC1-EZ is not fitting properly or possibly damaged, causing the grease to leak out. It may also be the grease zerk is a bit loose but unless it's an excess of grease it's not something to be overly concerned about. You can check the zerk for that, but otherwise just keep an...
    view full answer...
  • Stainless, Dacromet, and Galvanized Hub and Rotor Disc Brake Kit for 7k Trailer Axle
    I am sure we do but I need to know what axle capacity you have on your boat trailer. Can you get me that info? Most likely the capacity is between 7k and 12k which I attached a link to all the options we offer for that.
    view full answer...
  • Recommended Galvanized Idler Hubs For Timbren Axle-Less Trailer Suspension 7000lbs
    For the Timbren Axle-Less Trailer Suspension - Drop Spindle w Brake Flange - Regular Tires - 7K # TASR7KS02 we have a couple options for galvanized metal idler hubs. I recommend the Trailer Hub Assembly for 5,200-lb to 7,000-lb Axles - 8 on 6-1/2 - Galvanized # 8-231-50UC1 or the Trailer Hub Assembly for 5,200-lb to 7,000-lb E-Z Lube Axles - 8 on 6-1/2 - Galvanized # 8-231-50UC1-EZ. The EZ hubs give easier access to grease the bearings of your system.
    view full answer...
  • Timbren Axle Less and Hub Recommendation for 8 Lug Bolt Pattern and 4 inch Lift
    The 8 lug bolt pattern you are looking for is only available on higher capacity hubs than 3,500 so the parts you mentioned Timbren kit part # TASR5200S03 with hub part # 8-231-50UC1-EZ are exactly what you need for the added ground clearance and bolt pattern.
    view full answer...
  • Hub that Fits Same Spindle as Hub/Drum # 8-219-4UC3
    The part # 8-219-4UC3 is a hub/drum but for a hub without the drum that would fit the same spindle you would want the part # 8-231-50 and then would need to provide the seal part # RG06-090 as it does not come with seals and this is the same as what you need.
    view full answer...
  • Replacement Idler Hubs For A 7,000 Pound Axle With 9/16 Inch Studs
    When it comes to replacing your Idler Hubs on your 7,000 pound axle with 9/16 inch studs, The Easy Grease Trailer Idler Hub Assembly for 7K Axles - 8 on 6-1/2 # AKIHUB-865-7-1-EZ-K will work for you. This trailer hub assembly includes everything you will need to install. They have a sturdy iron construction, and have a zinc-enriched paint finish. These hubs are compatible with standard axles from most manufacturers, including Dexter, Lippert (LCI), and AL-KO. The hubs will fit a wheel...
    view full answer...
  • Upgrading Hubs From 6 Bolt to 8 Bolt for 5,200 lb Axles
    We have 2 different options for you to use to upgrade your 5,200 lb axles from 6 bolt to 8 bolt with 1/2 inch studs. Dexter Axle has the Trailer Hub Assembly, part # 8-231-9UC1-EZ, which is black in color and comes with the hub, inner bearing, part # 25580, outer bearing, part # 14125A, and the seal that you will be needing. This Trailer Hub Assembly also comes in a Galvanized Hub, part # 8-231-50UC1-EZ. Similar options that include the drums, in case you have brakes on your trailer,...
    view full answer...
  • Replacement Spindle And Hub For 6,000 lb Axle on Boat Trailer
    The information was helpful, thank you, and spindles are replaceable, they just need to be welded on by a qualified professional. In regards to the hub, there are a couple of options, depending on your current hub's bolt pattern. Basically, just if your current wheels fit hubs with 6 lugs or 8 lugs. So for a replacement spindle and accompanying hub for a 6,000 lb axle, here is what you will need: - #42 E-Z Lube Spindle with Flange for 5.2K to 7K Trailer Axles # TRU37FR - 6 on 5-1/2"...
    view full answer...
  • Which Spindle Fits Dexter Hub # 8-231-50UC1-EZ
    The spindle you need with the Dexter hub part # 8-231-50UC1-EZ you referenced is the number 42 spindle part # TRU37FR. The agricultural hub you referenced would not fit.
    view full answer...
  • 7,000 lb Trailer Axle 6 To 8 Lug Hub Conversion
    We have what you need to upgrade your 7,000 lb trailer axles but there are some things that we need to take a look at. Check your ID seal on your spindles. If they require a 2-1/8 inch seal, your wheel size is 16 to 17-1/2 inches and you have a 12 inch brake assembly, then you can use the Dexter Trailer Hub Assembly # 8-219-9UC3. This is for 5,200 to 7,000 lb axles. Now, for your idler axle, if it is a 5,200, 6,000 or 7,000 lb axle and has #42 spindles, you can use this Dexter Trailer...
    view full answer...
  • Availability Of Timbren Heavy-Duty Axle-Less Suspension 3500lb ASR35HDS01
    We sure do! You can visit the product page of the Timbren Heavy-Duty Axle-Less Trailer Suspension - Straight Spindle - Off-Road Tires - 3,500 lbs # ASR35HDS01 by clicking on the part number in this question. This Timbren Axle-Less Suspension is the Heavy-Duty version which means even though it has a 3500lb rating, it is made out of thicker metal than the standard version and uses 5200-7000lb hubs instead of 3500lb hubs. For hubs you can use Idler hub # 8-231-50UC1-EZ which has the 8...
    view full answer...
  • Is Trailer Hub # 8-231-50UC1-EZ Designed for Use with Trailer Brakes
    The hub part # 8-231-50UC1-EZ that you referenced is an idler hub. If you were looking for a similar hub that is setup for use with trailer brakes you would want the part # AKHD-865-7-G-EZ-K. Then if you needed brake assemblies you would want the part # AKEBRK-7R-SA for the right hand side and part # AKEBRK-7L-SA for the left hand side.
    view full answer...

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Info for this part was:

Employee Lindsey S
Edited by:
Lindsey S
Employee Jeff D
Installed by:
Jeff D
Employee Lisa S
Written by:
Lisa S
Employee Wilson B
Updated by:
Wilson B
Employee Mike S
Updated by:
Mike S

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