At a Glance

> Matched Pair: Two hubs per kit helps keep both sides of the axle consistent during service.
> Critical Fit Point: The key fitment detail is the 25580 inner bearing with 1.750" inner diameter.
> Seal Choice Matters: This version includes the 2.250" ID seal, with a 2.125" option available for axles that require it.
> Inner Bearing Check: Your axle must use 25580 with a 1.750" inner diameter for this kit to fit.
> Wrong Bearing Family: If your inner bearing is 44649 with a 1.375" inner diameter, this kit will not fit.
Brand: R & P Carriages
SKU: RVIH6550-KITX2

Before You Order

Match the part number, measurements and connection points that apply to your trailer.

Bearings	Match inner and outer bearing numbers.
Seal	Match the seal number or dimensions.
Bolt Pattern	Verify the complete lug pattern.
Brake Size	Confirm when applicable.

Product Details

Trailer Idler Hub Kit

(2) 6×5.5 Idler Hubs with 6,000 lb Bearing Kits – RVIH6550-KITX2

This two-hub kit includes a matched pair of 6 on 5.5" idler hubs with the bearing, seal, cap, and lug nut components commonly needed for service-ready installation on compatible trailer axle setups.

Part Number: RVIH6550-KITX2 2 Hub Kit 6 on 5.5" Pattern

Overview

This kit includes two 6×5.5 idler hubs with matching 6,000 lb bearing kits for compatible trailer applications using a 25580 inner bearing and 15123 outer bearing. Each hub includes pre-installed races and the common service parts needed to complete the assembly. It is a strong option for many utility, equipment, and livestock trailers using the listed bearing family, standard 6-lug wheel pattern, and required pilot clearance.

R&P Service Insight

Hub kits like this make the job cleaner when both sides of the axle need to be refreshed at once with the same matched bearing and hardware package.

Matched Pair: Two hubs per kit helps keep both sides of the axle consistent during service.
Critical Fit Point: The key fitment detail is the 25580 inner bearing with 1.750" inner diameter.
Seal Choice Matters: This version includes the 2.250" ID seal, with a 2.125" option available for axles that require it.

R&P Knowledge Hub

Compatibility: Designed for compatible trailer hub applications using a 25580 inner bearing, 15123 outer bearing, 6 on 5.5" bolt pattern, and 2.44" EZ-Lube style dust cap.

Vehicle / System Fit: Suitable for many utility, equipment, and livestock trailers using idler hub configurations in the listed bearing family.

Installation Notes: Always confirm existing bearing numbers, seal dimensions, wheel pilot clearance, and lug hardware requirements before ordering.

Performance Insight: Buying the pair helps streamline a full axle-side refresh and reduces the chance of mixing older worn parts with fresh components.

R&P Repair Insight

The most common ordering mistake on 6-lug hub kits is assuming the bolt pattern alone confirms fitment. It does not. Bearing numbers and seal dimensions still have to match your spindle and axle setup.

Inner Bearing Check: Your axle must use 25580 with a 1.750" inner diameter for this kit to fit.
Wrong Bearing Family: If your inner bearing is 44649 with a 1.375" inner diameter, this kit will not fit.
Seal Verification: Confirm whether your axle needs the included 2.250" ID seal or the alternate 2.125" version before installation.

Kit Includes

Two Idler Hubs

Includes two idler hubs with races installed for a cleaner, faster service job.

Matched Bearing Set

Each hub is paired with the listed inner and outer bearing combination for compatible setups.

Caps, Plugs, and Seals

Includes seals, 2.44" EZ-Lube dust caps, and dust cap plugs to complete the hub package.

Twelve Lug Nuts Included

Comes with twelve matching 1/2" conical seat lug nuts to finish the kit.

Specifications

Specification	Detail
Hub Bolt Pattern	6×5.5"
Inner Bearing	25580 (1.750" ID)
Outer Bearing	15123 (1.250" ID)
Seal Size	2.250" ID included; 2.125" optional
Dust Cap	2.44" EZ-Lube style
Included Lug Nuts	(12) 1/2" conical seat
Hub Quantity	2 hubs per kit
Part Number	RVIH6550-KITX2

Fitment / Application

Category	Details
Vehicle / System	Trailer idler hub applications using the listed bearing family and 6-lug hub pattern
Primary Fit	Many utility, equipment, and livestock trailers using a 25580 inner bearing and 15123 outer bearing
Secondary Fit	Applications requiring a 3.50" or larger wheel pilot diameter with a 6×5.5" wheel pattern
Notes	This bolt pattern matches many standard 6-lug trailer wheels and many GM pickup wheel patterns, but bearing numbers and pilot clearance still must be verified before ordering.

Included Components

Quantity	Item
2	Idler hubs (6 on 5.5" bolt pattern, with races installed)
2	Inner bearings – 25580 (1.750" ID)
2	Outer bearings – 15123 (1.250" ID)
2	Grease seals – 2.250" ID
2	2.44" EZ-Lube dust caps
2	Dust cap plugs
12	Matching 1/2" lug nuts

Verify your existing bearing numbers, seal size, wheel pilot clearance, and lug hardware requirements before installation. If your axle uses a 44649 inner bearing with 1.375" inner diameter, this kit will not fit. If you need the 2.125" seal size instead of the included 2.250" ID seal, contact us before ordering.

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