National 15243 Wheel Bearing Race - Front Outer

Overview of National 15243 Wheel Bearing Race

The National 15243 wheel bearing race is a precision-engineered taper bearing cup designed for driveline and axle applications. Specifically compatible with Chevrolet and GMC trucks and vans, this component ensures reliable wheel bearing performance and longevity.

• Part Number: 15243
• Brand: National
• Type: Taper bearing cup (wheel bearing race)
• Cup Bore Diameter: 2.4375 inches (61.913 mm)
• Cup Length: 0.5625 inches (14.288 mm)
• Cup Radius: 0.078 inches (1.981 mm)
• Compatible with Chevrolet and GMC C20, C1500, C2500, C3500, Express, Savana, and R-Series models

Detailed Product Description

The National 15243 wheel bearing race is manufactured to precise dimensions, including a cup bore of 2.4375 inches (61.913 mm), a cup length of 0.5625 inches (14.288 mm), and a cup radius of 0.078 inches (1.981 mm). These specifications are critical for maintaining proper bearing fit and function in the driveline assemblies of Chevrolet and GMC vehicles. This taper bearing cup is designed to provide a durable seating surface for the wheel bearing cone, reducing wear and ensuring smooth rotation under load.

Compatible Vehicles and Applications

This wheel bearing race is compatible with a range of Chevrolet and GMC trucks and vans, including:

• Chevrolet C20, C20 Suburban, C30
• Chevrolet C1500, C1500 Suburban, C2500, C2500 Suburban, C3500
• GMC Express 2500, Express 3500
• GMC G30, P20, P30, P2500, P3500
• GMC R20, R20 Suburban, R30, R2500, R2500 Suburban, R3500
• GMC Savana 2500, Savana 3500

Common Issues Addressed by National 15243 Wheel Bearing Race

• Eliminates wheel bearing play caused by worn or damaged bearing races
• Prevents premature bearing failure due to improper fit or surface wear
• Reduces noise and vibration from deteriorated bearing surfaces
• Restores proper bearing alignment and load distribution
• Supports safe and stable wheel rotation under heavy load conditions

Installation Notes and Tips

• Ensure the hub and spindle surfaces are clean and free of debris before installation
• Use appropriate tools to press the bearing race evenly into the hub bore to avoid distortion
• Verify the cup bore dimension (2.4375 inches) matches the hub specifications
• Inspect the bearing cone and related components for wear during replacement
• Follow vehicle manufacturer torque specifications when reassembling

Quality Assurance and Warranty

National wheel bearing races are manufactured to meet or exceed OEM specifications for fit and durability. The 15243 part undergoes rigorous quality control to ensure dimensional accuracy and material integrity. While specific warranty details may vary, National typically offers coverage against manufacturing defects to provide confidence in product reliability.