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  1. Trailer Hubs and Drums
  2. Dexter
  3. 5 on 4-1/2 Inch
  4. For 4200 lbs Axles
  5. Idler Hub
  6. 13 Inch Wheel
  7. 14 Inch Wheel
  8. 14-1/2 Inch Wheel
  9. 15 Inch Wheel
  10. 16 Inch Wheel
  11. 16-1/2 Inch Wheel
Trailer Idler Hub Assembly for 4,200-lb Axles - 5 on 4-1/2 - Galvanized
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Dexter

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

Part Number: DX45BR
In Stock
$100.17
Trailer Hubs and Drums
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Marine-grade hub is designed for use on trailer idler axles. Fits 4,2500-lb axles. Requires inner bearing (L68149) and race, outer bearing (L68149) and race, grease seal, grease cap, and lug nuts (not included). Galvanized finish is rust resistant. Great Prices for the best trailer hubs and drums from Dexter. Trailer Idler Hub Assembly for 4,200-lb Axles - 5 on 4-1/2 - Galvanized part number DX45BR 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 - DX45BR

Highlights

  • Built to Handle Wet, Salty Conditions: Galvanized, marine-grade hub resists rust for long life.
  • Fits 4,200-lb Axles: For idler axles using L68149 inner and outer bearings and matching races.
  • 5 on 4-1/2" Bolt Pattern: Works with 13"–17-1/2" wheels using 1/2" studs.
  • Ready for Reliable Towing: Includes races; Bearings sold separately; uses 010-172-00 grease seal (sold separately) and 2.560" grease cap (sold separately).
  • Proven Durability: Sturdy iron hub rated for 2,100-lb capacity and certified to QAI and CSA standards.

Features to know about

Built to Handle Harsh Water Conditions: Galvanized Marine-Grade Protection

Saltwater and moisture can eat through a hub in no time, but this marine-grade assembly is built to stand up to it. The galvanized finish offers excellent corrosion resistance and helps prevent rust even after repeated water exposure. It’s the kind of durability you want when your trailer sees wet ramps or long hauls in damp conditions.

Ready for Steady Loads: Designed for 4,200-lb Axles

This hub is made for consistent towing strength. It fits 4,200-lb axles and carries a 2,100-lb capacity per hub. The sturdy iron construction gives it the backbone to handle heavy use day after day without flex or fatigue.

Smooth Fit with Matching Bearings: Precision L68149 Setup

Both the inner and outer bearings use the same L68149 spec with a 1.378" inner diameter, so you get a uniform fit that keeps rolling resistance low. The pre-installed L68111 races are set from the factory so you don’t have to hammer them in. Just add your bearings, grease seal (010-172-00), grease cap, and lug nuts (all sold separately), and it’s ready to mount.

Simple Compatibility and Wheel Sizing: 5 on 4-1/2 Bolt Pattern

The bolt circle makes wheel matching straightforward. With a 5 on 4-1/2" pattern and 1/2" diameter x 1-5/16" long studs, it fits wheel sizes from 13" up to 17-1/2". That flexibility makes it easy to pair with common trailer wheel setups without extra measuring or guesswork.

Built Right and Certified Safe: QAI and CSA Approved

Each hub meets QAI and CSA certification standards for quality and safety. That means it’s been tested for performance before it ever hits your axle, giving you confidence every time you tow.

Specs

Weight and Capacity

  • Application: 4,200-lb trailer axles
  • Weight capacity: 2,100 lbs

Dimensions

  • Wheel size: 13" to 17-1/2"
  • Bolt pattern: 5 on 4-1/2"
  • Wheel stud dimensions: 1/2" diameter x 1-5/16" long
  • Grease cap flange diameter: 2.560"

Warranty

  • Limited warranty: 1-year

Bearing, Race, and Seal Information

  • Bearings (sold separately):
    • Inner bearing: L68149 (1.378" inner diameter)
    • Outer bearing: L68149 (1.378" inner diameter)
  • Races (included):
    • Inner race: L68111
    • Outer race: L68111
  • Grease seal (sold separately): 010-172-00
    • Inner diameter: 1.680"
    • Outer diameter: 2.565"

Determining the Bolt Pattern

  • Description: 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.
  • 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.)
  • 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.)
  • Alternative method: 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"
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"

K08-447-05 Dexter Trailer Idler Hub Assembly for 4.2K Axle - 5 on 4-1/2 - Galvanized





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Info for this part was:

Employee Jameson C
Expert Research:
Jameson C
Employee Wilson B
Updated by:
Wilson B
Employee Daron K
Edited by:
Daron K
Employee Andy C
Installed by:
Andy C
Employee Kim H
Written by:
Kim H

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