Timken SP450300 Wheel Bearing and Hub Assembly - Front

Timken SP450300 Front Wheel Bearing Hub Assembly

Timken SP450300 is a front wheel bearing and hub assembly for the 1998-2005 Chevrolet Blazer. It combines OE-developed testing, precision bearing construction, and integrated ABS sensing to support stable wheel-speed monitoring and consistent road feel.

• Fits 1998-2005 Chevrolet Blazer, front
• Wheel stud quantity: 5
• Bolt circle diameter: 4.750 in. / 120.65 mm
• Wheel pilot diameter: 2.762 in. / 70.16 mm
• Brake pilot diameter: 2.781 in. / 70.63 mm
• Hub pilot diameter: 3.507 in. / 89.08 mm
• Flange diameter: 5.764 in. / 146.40 mm
• Flange offset: 1.859 in. / 47.21 mm
• Non-driven hub assembly

Built for Front-End Service

This Timken wheel bearing and hub assembly is built around low runout to reduce noise and vibration while supporting braking consistency. The bearing uses precision internal geometry and refined surface finishes to improve load handling and bearing life, while the seal design adds contamination control and installation protection. The integrated ABS sensor is tested to monitor wheel speed for anti-lock braking system operation. This part number, SP450300, is a direct-fit option for Chevrolet Blazer front hub service.

This part cross-references QuickSteer 513200 and SKF BR930497 for the same application.

Common Problems It Can Address

• Front wheel bearing noise or growling
• Excessive hub play or looseness
• ABS warning light caused by wheel-speed signal issues
• Brake pulsation or vibration related to hub runout
• Uneven tire wear tied to front hub wear

Installation Notes and Tips

Verify the bolt circle, pilot diameters, flange offset, and wheel stud pattern before installation. Inspect the knuckle, axle interface, and brake components for wear or damage, and confirm the ABS connector and sensor routing match the vehicle harness. For Chevrolet Blazer front hub replacement, clean the mounting surfaces thoroughly and torque fasteners to the vehicle manufacturer’s specification.

Quality Assurance

Timken manufactures hub bearing assemblies using OE-developed testing and controlled design, material, and process standards. The assembly is built with premium bearings, reinforced sealing features, and a 100% tested ABS sensor to support consistent performance in service.