InMotion WB511039 Wheel Bearing - Rear

InMotion WB511039 Wheel Bearing

The InMotion WB511039 is a rear wheel bearing built for smooth rotation, reduced friction, and stable operation in automotive driveline service. It is a round, Gen 1, two-row ball bearing with a 45 mm inside diameter, 80 mm outside diameter, and 50 mm width for the specified application.

Compatible with 2004-2011 Mazda RX-8 rear wheel bearing applications, this part number WB511039 is a direct fitment reference for rear service on the Mazda RX-8. The InMotion WB511039 is engineered for consistent performance in rotating assemblies where bearing stability and durability matter.

• Round wheel bearing design
• Gen 1 bearing generation
• Two-row ball bearing construction
• 45 mm inside diameter
• 80 mm outside diameter
• 50 mm width
• No flange included
• Non-driven bearing type

Detailed Application Information

Built from high-quality materials, this wheel bearing is intended for automotive and industrial environments where dependable rotation and friction control are required. For Mazda RX-8 rear service, WB511039 supports smooth wheel-end operation and helps maintain rotational stability under normal driving conditions. If you are replacing a worn rear wheel bearing on a 2004-2011 Mazda RX-8, part number WB511039 provides the dimensional and bearing-type details needed for a proper match.

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

What This Bearing Helps Address

• Wheel-end noise caused by bearing wear
• Excess friction in the rear hub assembly
• Loose or unstable wheel rotation
• Vibration related to a deteriorated bearing
• Service replacement for rear Mazda RX-8 bearing wear

Installation Notes and Tips

Confirm the rear application and bearing dimensions before installation. Match the inside diameter, outside diameter, and width to the existing assembly, and inspect the hub, seals, and surrounding components for wear or damage during service. Proper press-fit handling and clean mating surfaces help support correct bearing seating and long-term operation.

Quality Assurance

InMotion positions this bearing as a durable, multi-purpose component built from high-quality materials for reliable performance across demanding environments. WB511039 is specified as a two-row ball bearing for the listed Mazda RX-8 rear application.