Timken SP450303 Wheel Bearing and Hub Assembly - Front

Timken SP450303 Wheel Bearing and Hub Assembly Overview

The Timken SP450303 wheel bearing and hub assembly is engineered for reliable performance on select GM trucks and SUVs. Designed as a non-driven hub, this assembly supports smooth wheel rotation and precise fitment for vehicles like the Chevrolet Silverado 1500 and Cadillac Escalade.

• Flange bolt hole quantity: 3 for secure mounting
• Wheel pilot diameter: 3.063 inches (77.81 mm)
• Brake pilot diameter: 3.088 inches (78.44 mm)
• Wheel stud quantity: 6 for robust wheel attachment
• Hub pilot diameter: 3.913 inches (99.34 mm)
• Flange offset: 1.976 inches (50.18 mm)
• Flange diameter: 7.059 inches (179.30 mm)
• Bolt circle diameter: 5.500 inches (139.70 mm)
• Drive type: Non-driven hub assembly

Detailed Product Description

The Timken SP450303 is a wheel bearing and hub assembly designed specifically for non-driven wheels on GM full-size trucks and SUVs. Its precise flange bolt hole count of three and six wheel studs ensure a secure and stable connection to the vehicle’s suspension and wheel. The wheel pilot diameter of 3.063 inches and brake pilot diameter of 3.088 inches provide accurate centering for the wheel and brake components, reducing vibration and improving overall ride quality. The hub pilot diameter of 3.913 inches supports proper alignment with the axle hub, while the flange offset of 1.976 inches maintains correct wheel positioning relative to the vehicle’s suspension geometry. This assembly is compatible with models including the Chevrolet Avalanche, Silverado 1500, Suburban 1500, Tahoe, as well as the Cadillac Escalade and GMC Yukon XL 1500.

Common Applications and Problem Resolution

• Replacement for worn or damaged wheel bearing and hub assemblies on GM trucks and SUVs
• Eliminates wheel vibration and noise caused by bearing wear
• Restores proper wheel alignment and brake rotor centering
• Addresses wheel stud damage or corrosion issues
• Prevents premature tire wear due to hub misalignment

Installation Notes and Tips

• Ensure vehicle is securely lifted and supported before removal
• Clean mounting surfaces thoroughly to prevent improper fitment
• Torque flange bolts and wheel studs to manufacturer specifications
• Inspect related suspension and brake components during installation
• Use appropriate tools to avoid damage to the hub assembly

Quality Assurance and Warranty

Timken wheel bearing and hub assemblies are manufactured to meet or exceed OEM specifications, ensuring durability and reliable performance. The SP450303 part number undergoes rigorous quality control testing to maintain consistent standards. Timken typically offers a limited warranty covering defects in materials and workmanship; please refer to Timken’s official warranty documentation for specific terms and conditions.