Service your UCA instead of replacing the entire arm. This COMH20T 1.25-inch replacement uniball restores smooth, precise articulation in compatible RRW upper control arms and other aftermarket or custom-fabricated UCA assemblies built around the same bearing dimensions.

Service Your UCA. Keep the Arm.

A worn uniball does not mean your entire upper control arm is finished.

The COMH20T is a serviceable, PTFE-lined spherical bearing commonly used in off-road upper control arms, long-travel suspension systems, custom A-arms and fabrication projects. It replaces the wearable joint inside compatible RRW UCAs and many other aftermarket control arms using the same 1.25-inch bore and 2.375-inch outside diameter.

Whether you call it a uniball, uni-ball or spherical plain bearing, this is the replacement component that restores tight, smooth suspension movement without purchasing a complete new UCA.

Product Highlights

• Replacement COMH20T spherical bearing for compatible serviceable UCAs

• 1.250-inch bore and 2.375-inch outside diameter

• Fits compatible RRW 1.25-inch uniball applications

• Commonly used by aftermarket UCA manufacturers and custom fabricators

• PTFE-lined for smooth, low-friction articulation

• Hard-chrome-plated, heat-treated steel ball

• 17-degree maximum total ball swivel

• Replaceable wear component helps extend the service life of the control arm

• Suitable for off-road suspension, long-travel and custom fabrication projects

Dimensions and Specifications

• Bearing designation: COMH20T

• Bore diameter: 1.2500" +0.0025"/-0.0005"

• Outside diameter: 2.3750" +0.0000"/-0.0007"

• Inner-ring width: 1.187" ±0.005"

• Outer-race width: 0.937" ±0.005"

• Face diameter: 1.610" reference

• Ball diameter: 2.000" reference

• Maximum swivel: 17 degrees total, ±8.5 degrees

• Ball material: heat-treated 52100 steel, hard chrome plated

• Race material: low-carbon steel

• Liner: PTFE fabric

• Ultimate static radial load: 100,730 lbf

• Approximate weight: 0.895 lb

Fitment

This bearing fits upper control arms and custom bearing cups specifically designed for COMH20T dimensions.

Fitment is determined by the bearing dimensions and retention method—not the vehicle or UCA brand alone. Before ordering, verify the number marked on the existing bearing or confirm all critical measurements:

• 1.250-inch bore

• 2.375-inch outside diameter

• 1.187-inch inner-ring width

• 0.937-inch outer-race width

For RRW upper control arms, confirm that your specific application uses the 1.25-inch uniball. Some RRW applications use a larger 1.5-inch bearing, and this COMH20T will not fit those arms.

Other manufacturers may use proprietary bearing cups, retaining rings, spacers or dimensional variations. Matching the bore alone does not guarantee fitment.

What Is Included

• One COMH20T replacement spherical bearing

Dust boot, retaining ring, misalignment spacers and mounting hardware are not included unless specifically selected or stated elsewhere on the page.

Installation

Professional installation is recommended. Removal and installation procedures vary by control-arm manufacturer and may require a press and retaining-ring tools.

Inspect the bearing cup, retaining ring, dust boot, spacers and mounting hardware before installing the new bearing. Apply press force only where directed by the control-arm or bearing manufacturer. Do not press through the inner ball or damage the PTFE liner.

Follow the UCA manufacturer’s torque specifications and have the suspension alignment checked after service when appropriate.

Frequently Asked Questions

Will this fit my RRW upper control arms?

It fits compatible RRW UCAs that use a 1.25-inch COMH20T uniball. It does not fit RRW applications equipped with a 1.5-inch uniball. Verify the existing bearing number or dimensions before ordering.

Will it fit upper control arms from another brand?

Possibly. COMH20T is a common bearing configuration used by multiple aftermarket UCA manufacturers and custom fabricators. Fitment must be confirmed by matching the bore, outside diameter, widths and retention method.

Is this bearing greasable?

The COMH20T uses a PTFE liner and does not use lubrication grooves or a grease fitting. Do not apply grease directly to the PTFE bearing liner unless instructed by the bearing manufacturer.