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  1. Trailer Hubs and Drums
  2. Dexter
  3. 5 on 4-1/2 Inch
  4. For 2000 lbs Axles
  5. Hub with Drum
  6. 12 Inch Wheel
  7. 13 Inch Wheel
  8. 14 Inch Wheel
  9. 14-1/2 Inch Wheel
  10. 15 Inch Wheel
Dexter Trailer Hub and Drum Assembly for 2,000-lb Axles - 7" - 5 on 4-1/2
Dexter

Dexter Trailer Hub and Drum Assembly for 2,000-lb Axles - 7" - 5 on 4-1/2

Part Number: 8-257-5UC3
In Stock
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$188.58
Trailer Hubs and Drums
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Install this hub-and-drum assembly on your trailer. For electric or hydraulic brakes. Fits 2,000 axles with BTR spindles. Inner bearing (L44649) and race, outer bearing (L44649) and race, grease seal, grease cap, wheel bolts, and lug nuts included. Great Prices for the best trailer hubs and drums from Dexter. Dexter Trailer Hub and Drum Assembly for 2,000-lb Axles - 7" - 5 on 4-1/2 part number 8-257-5UC3 can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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Dexter Trailer Hubs and Drums - 8-257-5UC3

  • 5 on 4-1/2 Inch
  • For 2000 lbs Axles
  • Hub with Drum
  • 12 Inch Wheel
  • 13 Inch Wheel
  • 14 Inch Wheel
  • 14-1/2 Inch Wheel
  • 15 Inch Wheel
  • Standard
  • Standard Grade
  • L44649 / L44649
  • 1/2 Inch Stud
  • Dexter

Install this hub-and-drum assembly on your trailer. For electric or hydraulic brakes. Fits 2,000 axles with BTR spindles. Inner bearing (L44649) and race, outer bearing (L44649) and race, grease seal, grease cap, wheel bolts, and lug nuts included.


Features:

  • Trailer hub-and-drum assembly provides surface area for brake shoes to grip when brake is activated
    • For use with electric brakes only
  • Sturdy iron construction
  • Bearings, races, grease seal, grease cap, wheel bolts, and lug nuts are included
  • Hub and drum are made in the USA


Specs:

  • Application: 2,000-lb trailer axles with BTR spindles
    • Works with 7" x 1-1/4" brake assembly
  • Wheel size: 12" - 15"
  • Bolt pattern: 5 on 4-1/2"
  • Wheel bolt diameter: 1/2"
  • Weight capacity: 1,000 lbs


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: 1.500"
    • Outer diameter: 1.987"

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"


K08-257-91 Dexter 7" Hub and Drum Assembly for 2K Axle with Hardware - 5 on 4-1/2

Replaces 8-257-5UC3




California residents: click here


Customer Satisfaction Score:

Ratings & Reviews

4.7

1066 reviews
Install this hub-and-drum assembly on your trailer. For electric or hydraulic brakes. Fits 2,000 axles with BTR spindles. Inner bearing (L44649) and race, outer bearing (L44649) and race, grease seal, grease cap, wheel bolts, and lug nuts included.

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Quick shipping nice product.



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1066
Show More Reviews

See what our Experts say about this Dexter Trailer Hubs and Drums

  • Adding Brakes to 1999 Jayco Heritage Glacier with Dexter 2,500 lb Axles
    A Dexter 2,500 lb axle uses hubs that have inner and outer bearings of L44649 like the part # 8-257-5UC3 which has a 5 lug bolt pattern or the # 8-173-16UC3-EZ which has a 4 lug bolt pattern. These both come with bearings and seals as well. For brake assemblies you'd want the part # 23-47 for the left hand side and # 23-48 for the right hand side and you'd be set. I attached a help article link on adding electric brakes to a trailer for you to check out as well that I think you'll find...
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  • Lug Nut Torque Chart for Trailer Wheels
    In order to determine the torque rating for the lug nuts on your trailer you will need to know check out the chart I attached that shows all of the torque specs for all the trailer lugs available based on stud size, wheel material and wheel size.
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  • Adding Electric Brakes To 2,200lb Dexter Torsion Axles
    It is possible to weld on a brake flange such as Brake Mounting Flange for 1-3/4" Round Trailer Axles - 2K # 4-34 for 1-3/4" round axles, but it takes a qualified welder and even then it can be difficult to accomplish. A better solution is to upgrade your current axles with something like Timbren Axle-Less Trailer Suspension System - Spindle w/Brake Flange - Regular Tires - 2,200 lbs # ASR1THDS01, or if you need lift spindles you can go with Timbren Axle-Less Trailer Suspension System -...
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  • 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
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  • Parts Needed to Change Hydraulic Trailer Brakes Over to Electric Brakes on a 1997 Jayco Tent Trailer
    You will need two of the 7 inch electric brake assemblies, one right hand, # 23-48, and one left hand, # 23-47. You will also need an appropriate length of 10 gauge wire, item # 10-2-1, for running the wires to the trailer connector at the trailer coupler. Next, you will need a trailer connector to match the wiring on your vehicle, or the wiring you will need to install on your vehicle, to activate the electric brakes. I would recommend the Pollak trailer connector, item # PK12706, for...
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  • Replacing Dexter Idler Hub 008-258-05 with Hub and Drum Assembly # 8-257-5UC3
    Yes, our part number system uses # 8-257-5UC3 but it is the exact same as Dexter part K08-257-91. Dexter does not limit the hub and drum assembly to 12 inch wheels so yes, you could use a 14 inch wheel with assembly # 8-257-5UC3. Since you told me which hub you have, 008-258-05, I can tell you that you have a BTR spindle. It takes inner and outer bearing L44649. The spindle diameter is slightly more than 1 inch (1.063-ish inches). No need to change the spindle since you won't need to...
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  • Adding Electric Trailer Brakes to 2009 Jayco Jay Series
    Thanks for the picture of your axle as I can see a brake mounting flange which means brakes can be added. Now what we have to do next is determine you axle capacity so we can pick out the correct hub/drums and then from there the correct brake assemblies. Also, what trailer wiring does your Sienna have? You'll need a brake controller to control the trailer's brakes.
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  • What Is Torque Spec For 1/2" Lug Nuts On Steel Rims?
    Hello Danny, thanks for reaching out. The exact torque spec will depend on the wheel size. For example a 1/2" coned lug nut on a 15" steel rim should be torqued to 90-120 ft. lbs. I have included our torque chart for your reference. What size rims do you have?
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  • Torque Spec for Lug Nuts on 15" Wheels on 2014 Diamond Cargo Trailer
    Hey David! The torque spec depends on the size of the studs and the type of wheel you have. If you have 1/2" studs on a steel wheel it is 90-120 ft.-lbs. If you have 1/2" studs on an aluminum wheel it is 90-100 ft.-lbs.
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  • Parts Needed to Add Brakes to 1992 Coleman Arcadia Pop-Up Camper
    Based on your manual indicating 7" brakes it is probably a 2,000 lb axle. That should be a 4-bolt brake flange on the axle as well. Try checking your axle tag to see if you can verify this. The capacity may be listed, or it can be found with the serial number. You will need the following parts to add brakes: -Dexter Trailer Hub and Drum Assembly for 2,000-lb Axles - 7" - 5 on 4-1/2 # 8-257-5UC3 -Dexter Electric Trailer Brake Kit - 7" - Left and Right Hand Assemblies - - 2,000- to 2,200-lbs...
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  • Recommended Lug Nut Torque For Dexter Trailer Hub and Drum Assembly # 8-257-5UC3
    The Dexter Trailer Hub and Drum Assembly, part # 8-257-5UC3, you have referenced will come with a 1/2-inch cone seat lug nut. When attaching the wheel to the hub and drum assembly the 1/2-inch lug nuts should be torqued to 75 to 85 ft. lbs.
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  • What Should Trailer Lug Nuts be Torqued To on a Small Trailer with 4.80-12 Tires
    You likely have 1/2 inch studs on the trailer hub. For 1/2 inch you will want to torque the lug nuts to 75 - 85 foot pounds. For 9/16 inch lug nuts torque them to 135 - 145 foot pounds. And for 5/8 inch lug nuts torque them to 175 - 225 foot pounds.
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  • Adding Electric Brakes To A Triton Boat Trailer With 10" Wheels
    I can certainly point you in the right direction. First and foremost we would want to verify that your axle does in fact have a brake flange. Some smaller axles do not come with brake flanges, and this will be required in order to install electric brakes. We do carry a brake mounting flange # 4-35 which can be fabricated to fit your axle if needed. We also need to verify what kind of axle is on your trailer. Specifically we need to know the inner and outer bearing sizes. This will tell...
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  • Parts Needed to Install Electric Trailer Brakes on a Pop-Up Camper
    You have compatible hub and brake assemblies selected. The brake assemblies, # 23-48 right hand, and # 23-47 left hand, will mount to a 4 bolt flange that has bolt holes 2-7/8 inches apart on center. You will need to make sure your existing bearings and seal match the bearings and seal in the hub and drum you selected, # 8-257-5UC3-EZ, and that the wheel bolt pattern, 5 on 4-1/2 inches, matches also. The trailer hub and drum # 8-257-5UC3-EZ is designed for use on an EZ lube axle with grease...
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  • Torque Specs for Trailer Wheel Lug Nuts
    That really depends on the material of your rim and the diameter of your wheel studs. If you have a steel wheel with a 1/2 inch stud you would use 90-120 ft/lbs. Steel with 9/16 inch stud 120-140 ft/lbs. Aluminum with 1/2 inch stud 90-100 ft/lbs. Aluminum with 9/16 inch stud 120-140 ft/lbs.
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  • What is the Correct Torque Specification for Trailer Wheel
    Torque specs for trailer and vehicle wheels are based on the size of the wheel stud, the type of lug nut, and the material the wheel is made of, steel or aluminum. For example, the linked chart shows you the varying torque values for a range of larger wheel sizes based on these factors. Without knowing more about your hubs and wheels I cannot give you a specific torque value, but it is likely that that spec would fall into the range of 75-80-ft-lbs.
    view full answer...
    Image 1 for
  • Lug Nut Torque for Higher Capacity Trailer Axles
    For 9/16 inch lug nuts torque them to 135 - 145 foot pounds. And for 5/8 inch lug nuts torque them to 175 - 225 foot pounds. I'd imagine a 12k rated axle has the 5/8 inch stud diameter but you should verify.
    view full answer...
  • Can Electric Trailer Brakes be Used with Hydraulic Brake Hub and Drums
    Some hub/drum assemblies can accept either electric or hydraulic brakes and some can only accept one or the other. It has to do with the amount of space inside the drum itself. The Trailer Hub and Drum Assembly, # 8-257-5UC3, is designed for electric brake assemblies. On many drums you can use either electric or hydraulic brakes. Since you are switching over to electric brakes it would be best to also change the hub/drum assemblies to some that are made specifically for electric brake...
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  • Can a 2,000 Pound Trailer Axle be Fitted with Electric Brakes and 10 or 12 Inch Wheels
    You would need to step up to a 3500 pound set up to get an axle that comes with brake mounting flanges. You could have brake mounting flanges welded to a 2K axle if you wanted but it is a precision job that requires the proper equipment and someone who has performed this job before. So for example you could use axle # T20BTR-6048 with hub and drum assembly # 8-257-5UC3. then you would need brake mounting flange # 4-34 and brake assemblies # 23-47 and # 23-48. The hub and drum assembly...
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  • What Size Hub/Drums Can Fit Behind 12 inch Trailer Wheel
    The largest diameter drum that can fit behind a 12 inch trailer wheel is a hub/drum designed to fit a 7 inch diameter brake assembly like the # 8-257-5UC3. That said the different size hub/drums all fit different size spindles. So you have to first determine what spindle you have and then fit the correct hub to it. It looks like you do have a brake flange like you mentioned so that's a really good sign. I attached a help article that covers the process of adding brakes to a trailer for...
    view full answer...
    Image 1 for Image 2 for
  • How Tight Should Lug Nuts of Trailer with 15 inch Steel Wheel Be
    Since your wheels are 15 inches in diameter and the wheel material is steel the correct amount of torque to use for the lug nuts is between 90 and 120 ft lbs.
    view full answer...
  • Why Are Dexter Drums 8-271-7UC3-EZ and 8-257-5UC3 So Different In Price?
    The reason for the price difference is the Dexter Trailer Hub and Drum Assembly # 8-271-7UC3-EZ are only compatible with hydraulic brakes, where the # 8-257-5UC3 are compatible with electric and hydraulic brakes. Since most people use electric trailer brakes on this size axle the # 8-257-5UC3 is the more popular choice. For compatible braking assemblies we have the Dexter Hydraulic Trailer Brake Kit # 23-398-399 if you are wanting hydraulic brakes, or Electric Trailer Brake Kit # AKEBRK-2...
    view full answer...
  • Electric Brakes for 10 Inch Wheels
    We very likely have electric brakes that will work for you, but 10 inch wheels are normally reserved for hub and drums with smaller capacities such as the Dexter Trailer Hub and Drum Assembly for 2,000-lb Axles # 8-257-5UC3. In order to determine the electric brakes that will work for you, you need to know your axle capacity but also the brake's mounting flange bolt pattern and the inside diameter and depth of your drum. For example, the aforementioned drum is 7" x 1-1/4". You will need...
    view full answer...
  • Lug Nut Torque Setting for 14-Inch Steel Trailer Wheels on 1/2-Inch Wheel Studs
    Wheel torque specs vary based on stud diameter, wheel diameter and wheel material. The linked chart shows you commonly recommended torque specs for a range of studs and wheels. For 1/2-inch wheel studs and a 14-inch steel trailer wheel you will use a torque range of 75-to-85-ft-lbs.
    view full answer...
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