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Trailer Parts Pro 3,500 lb Trailer Axles Pre-Greased Idler Hub Assembly 5 on 4.5" Bolt Pattern, #84 Spindle, 1/2" Studs, H84545BX


Regular price $66.79 USD
Shipping calculated at checkout.

Care information

To ensure optimal performance and extend the service life of your new trailer components, please follow these care guidelines after purchase:

  • Before installation, check all parts for shipping damage or missing components. Do not install damaged parts.
  • Always use correct tools and torque settings. Improper installation can lead to premature wear or failure.
  • For bearings, suspensions, and brake components, apply high-quality trailer grease before first use if not pre-greased.
  • Some parts (like brake assemblies) require a short break-in period to achieve full performance. Follow manufacturer instructions for best results.
  • Recheck fasteners, grease levels, and moving components after 100 miles of towing, then at regular intervals.
  • After exposure to water, road salt, or mud, clean and dry parts thoroughly. Apply anti-rust treatment if needed.
  • If storing unused parts, keep them in a dry, sealed container away from moisture and direct sunlight.

Delivery and Shipping

Handling Time: Orders ship out within 1 business day after payment is received.

Shipping Methods: We use trusted carriers like UPS, FedEx, or USPS based on package size and destination.

Delivery Time: Estimated delivery within 2–6 business days (U.S. domestic orders).

Tracking: A tracking number will be provided once your order is dispatched.

This brake assembly fits most standard 7,000 lb trailer axles that use 12" × 2" electric brakes with a 5-bolt mounting flange. Please verify your axle rating and brake dimensions before ordering. If you're unsure, send us your axle tag or hub information and we'll help confirm compatibility.
Yes. It is compatible with many standard Dexter, Lippert, Rockwell American, AL-KO, and other 7,000 lb trailer axles that use a standard 12" × 2" brake assembly. Always verify your axle specifications before purchasing.
Yes. This is a self-adjusting electric brake assembly, which automatically maintains proper brake shoe clearance during normal operation. This reduces maintenance and helps provide consistent braking performance.

Product Overview:

This comprehensive pre-greased trailer idler hub assembly provides a reliable replacement solution for 3,500 lb axles equipped with a #84 spindle. Designed with a 5 on 4.5" bolt pattern and 1/2" studs, the kit offers peak convenience as the inner and outer bearing races arrive professionally pressed into the hub body. The heavy-duty painted finish paired with dual grease or Zerk-lube compatibility delivers long-lasting protection and smooth rotation for your trailer's wheel assembly.

What's Included by Kit Option:

1 x 5 on 4.5" Pre-greased Hub

1 x L68149 Inner Bearing

1 x L44649 Outer Bearing

1 x L44610 Outer Race

1 x L68111 Inner Race

1 x 10-19 Grease Seal

1 x 46749 Grease Cap

1 x 21-41-1 Grease Cap

1 x 85-1 Grease Cap Plug

5 x X1023R Coned Wheel Nuts

Specifications:

Brand: Trailer Parts Pro

Manufacture Part Number: H84545BX

Alternate Item Numbers: PP84545, PPG84545RA, 7650073-03B

Bolt Pattern: 5 on 4.5"

Axle Capacity Rating Per Pair: 3.5K

Capacity Per Hub: 1,750 lbs

Fits Spindle: #84

Stud Size: 1/2"

Finish: Painted

Inner Bearing Part Number: L68149

Outer Bearing Part Number: L44649

Seal Inner Diameter: 1.719"

Thread Count: 20

Lubrication: Grease or Zerk-Lube

Payment & Security

Payment methods

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  • Visa

Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.

  • 5 stars: 3 (100%)
  • 4 stars: 0 (0%)
  • 3 stars: 0 (0%)
  • 2 stars: 0 (0%)
  • 1 star: 0 (0%)
L
Luis Cardenas
Good Upgrade

Having the hub pre-greased saved time and made the installation more convenient.

B
Bruno Camacho
Easy Solution

The pre-greased hub assembly fit securely and performed well on the trailer.

R
Rafael Pineda
Buena Mejora

El patrón de 5 en 4.5 coincidió muy bien y facilitó toda la instalación.

  • 5 stars: 3 (100%)
  • 4 stars: 0 (0%)
  • 3 stars: 0 (0%)
  • 2 stars: 0 (0%)
  • 1 star: 0 (0%)
L
Luis Cardenas
Good Upgrade

Having the hub pre-greased saved time and made the installation more convenient.

B
Bruno Camacho
Easy Solution

The pre-greased hub assembly fit securely and performed well on the trailer.

R
Rafael Pineda
Buena Mejora

El patrón de 5 en 4.5 coincidió muy bien y facilitó toda la instalación.