Timken HA590088 Wheel Bearing and Hub Assembly - Rear

Timken HA590088 Wheel Bearing and Hub Assembly Overview

The Timken HA590088 wheel bearing and hub assembly is engineered for reliable performance in select Chevrolet, Pontiac, and Saturn vehicles. Designed as a non-driven hub, this assembly ensures proper fitment and function for models including the Chevrolet Cobalt, Pontiac G5, Saturn Ion, and Saturn HHR.

• Non-driven wheel bearing and hub assembly
• Five wheel stud quantity for secure wheel mounting
• Four flange bolt holes for precise installation
• Wheel pilot diameter of 2.558 inches (64.97 mm)
• Brake pilot diameter of 2.577 inches (65.45 mm)
• Hub pilot diameter of 2.362 inches (60.00 mm)
• Flange diameter measuring 5.512 inches (140.00 mm)
• Bolt circle diameter of 4.331 inches (110.00 mm)
• Flange offset of 3.085 inches (78.36 mm)

Detailed Product Description

The Timken HA590088 wheel bearing and hub assembly is designed to meet the exact specifications required for non-driven wheel applications on Chevrolet Cobalt, Pontiac G5, Saturn Ion, and Saturn HHR vehicles. Featuring a five-stud wheel configuration and four flange bolt holes, this assembly provides a secure and stable connection between the wheel and axle. The precise pilot diameters for the wheel (2.558 inches) and brake components (2.577 inches) ensure proper alignment and fitment, reducing vibration and promoting even wear. The hub pilot diameter of 2.362 inches supports accurate centering of the hub on the axle, while the flange diameter and bolt circle diameter are engineered to match factory specifications for these models. The flange offset of 3.085 inches helps maintain correct wheel positioning relative to the suspension and brake system.

Compatible Vehicles and Applications

This wheel bearing and hub assembly is compatible with the following vehicles:

• Chevrolet Cobalt
• Pontiac G5
• Saturn Ion
• Saturn HHR

It is intended for use in non-driven wheel positions, making it suitable for front or rear hubs depending on the vehicle's drivetrain configuration.

Common Issues Addressed by This Assembly

• Eliminates wheel bearing noise caused by wear or damage
• Resolves wheel vibration and wobble issues
• Corrects uneven tire wear due to hub misalignment
• Prevents brake rotor runout by maintaining proper brake pilot diameter
• Restores secure wheel mounting with correct stud and bolt hole configuration

Installation Notes and Tips

• Verify vehicle compatibility with Chevrolet Cobalt, Pontiac G5, Saturn Ion, or Saturn HHR before installation
• Ensure the hub pilot diameter matches the axle hub for proper centering
• Use proper torque specifications on flange bolts and wheel studs to avoid premature wear
• Inspect related components such as brake rotors and calipers during installation
• Replace wheel bearing and hub assembly as a complete unit to maintain safety and performance

Quality Assurance and Warranty

Timken manufactures the HA590088 wheel bearing and hub assembly to meet stringent quality standards. Each unit undergoes rigorous testing to ensure durability and precise fitment. While specific warranty details may vary, Timken typically offers coverage against defects in materials and workmanship. Consult product documentation or authorized sources for exact warranty terms.