InMotion WB511021 Wheel Bearing - Rear Inner

Wheel Bearing for Toyota Rear Inner Applications

The InMotion WB511021 is a sealed ball wheel bearing built for rear inner service on select Toyota trucks and SUVs. With a 40 mm inside diameter, 90 mm outside diameter, and 23 mm width, it is sized for specific rear hub applications that require smooth rotation and reduced friction.

Compatible with Toyota 4Runner, Tacoma, T100, and Pickup rear inner positions, this bearing supports consistent wheel-end operation across multiple model years. The WB511021 is a practical replacement choice when servicing a worn or noisy rear wheel bearing.

Key Features

• Part number: WB511021
• Wheel bearing type: ball bearing
• Sealed bearing design for protected operation
• Round profile
• Inside diameter: 40 mm (1.575 in.)
• Outside diameter: 90 mm (3.543 in.)
• Width: 23 mm (0.906 in.)
• Single-row construction
• No snap rings included

Detailed Description

InMotion WB511021 is a sealed, single-row ball wheel bearing engineered for rear inner use in Toyota driveline and axle applications. It is listed for 1990-2000 Toyota 4Runner rear inner, 1995-2000 Toyota Tacoma rear inner, 1993-1998 Toyota T100 rear inner, and 1991-1995 Toyota Pickup rear inner with Single Rear Wheels (SRW). The sealed design helps retain lubrication and keep contaminants out, which is important in wheel-end service where heat, load, and road exposure are constant factors. This part number, WB511021, is a direct-fit style option for the specified rear inner positions.

This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

What It Helps Address

• Wheel bearing noise from a worn rear inner bearing
• Excessive wheel-end play or looseness
• Rough rotation in the rear hub assembly
• Contamination-related bearing wear in sealed service locations
• Service replacement for Toyota rear inner wheel bearing applications

Installation Notes and Tips

• Verify the rear inner position and dimensions before installation.
• Inspect the hub, spindle, and related sealing surfaces for wear or damage.
• Clean all mating surfaces thoroughly before assembly.
• Use proper bearing service procedures and torque specifications for the vehicle.
• Confirm fitment for the exact Toyota model and year before ordering; WB511021 is listed for the rear inner position only.

Quality Assurance

InMotion manufactures this bearing from high-quality materials for durable wheel-end service in automotive and industrial environments. The sealed ball bearing construction is intended to support stable, low-friction operation in the specified Toyota rear inner applications.