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Trailer Parts Pro 2,000 lb Trailer Axles, Idler Hub Kit 4 on 4" Bolt Pattern, BT8 Spindle, H34822BX


Regular price $46.79 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 premium trailer idler hub assembly provides a dependable solution for 2,000 lb capacity axles featuring a 4 on 4" bolt pattern and BT8 1" spindles. The kit comes completely pre-greased for ultimate user convenience, with the inner and outer bearing races already professionally pressed into the hub assembly. This robust replacement assembly is compatible with both standard grease and Zerk-lube lubrication systems to deliver smooth, reliable rotation and extended wheel bearing performance.

What's Included by Kit Option: 

1 x 4 on 4" Pre-greased Hub

2 x L44643 Inner and Outer Bearings

2 x L44610 Inner and Outer Races

1 x 12192TB Grease Seal

1 x 46749 Grease Cap

1 x 21-41-1 Grease Cap

1 x 85-1 Grease Cap Plug

4 x X1023R Coned Wheel Nuts 

Specifications:

Brand: Trailer Parts Pro

Manufacture Part Number: H34822BX

Alternate Item Numbers: 34822BX, PP88440, PGH34822

Bolt Pattern: 4 on 4"

Axle Capacity Rating Per Pair: 2,000 lbs

Capacity Per Hub: 1,250 lbs

Fits Spindle: BT8 1"

Stud Size: 1/2"

Finish: Painted

Inner Bearing Part Number: L44643

Outer Bearing Part Number: L44643

Lubrication: Grease or Zerk-Lube

Seal Inner Diameter: 1.249"

Thread Count: 20

Payment & Security

Payment methods

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

  • 5 stars: 3 (75%)
  • 4 stars: 1 (25%)
  • 3 stars: 0 (0%)
  • 2 stars: 0 (0%)
  • 1 star: 0 (0%)
P
Patrick Nolan
Nice Replacement

Everything lined up properly with the axle and the hub installed smoothly.

J
Jason Parker
Smooth Setup

The 5 on 4.5 bolt pattern matched perfectly and made installation easy.

G
Grant Coleman
Reliable Fit

The pre-greased hub was convenient and ready to mount without extra work.

C
Carlos Villanueva
Todo Perfecto

El cubo para eje de 2,000 lb quedó firme y funcionó como esperaba.

  • 5 stars: 3 (75%)
  • 4 stars: 1 (25%)
  • 3 stars: 0 (0%)
  • 2 stars: 0 (0%)
  • 1 star: 0 (0%)
P
Patrick Nolan
Nice Replacement

Everything lined up properly with the axle and the hub installed smoothly.

J
Jason Parker
Smooth Setup

The 5 on 4.5 bolt pattern matched perfectly and made installation easy.

G
Grant Coleman
Reliable Fit

The pre-greased hub was convenient and ready to mount without extra work.

C
Carlos Villanueva
Todo Perfecto

El cubo para eje de 2,000 lb quedó firme y funcionó como esperaba.