National A-55 Wheel Bearing and Race Set - Front Inner

National A-55 Wheel Bearing Set for Ford Super Duty

National A-55 is a front inner wheel bearing and race set for select Ford heavy-duty trucks. It is built with premium-grade steel and a tapered cup-and-cone design to support even load distribution in demanding driveline service.

Key Features

• Premium-grade steel construction for wheel-end durability
• Crowned raceways and rollers help distribute load evenly
• Tapered bearing set with cup and cone design
• Front inner position fitment
• Cross-references Timken SET702 and Schaeffler NP640324 for the same application

Detailed Description

This National wheel bearing and race set is engineered for Ford F-250 Super Duty and Ford F-350 Super Duty front inner wheel-end service, plus 2008-2009 Ford F-250 front inner applications. The A-55 part number is a direct-fit service option for tapered wheel bearing replacement where proper race and roller geometry matter for load handling and smooth rotation. National A-55 is a practical choice when servicing the front inner bearing on Ford F-250 Super Duty and Ford F-350 Super Duty trucks.

What It Helps Address

• Wheel-end noise from worn bearing surfaces
• Excessive play at the front inner hub area
• Rough rotation caused by damaged rollers or races
• Load distribution issues in tapered bearing service
• Maintenance replacement for high-mileage Ford truck wheel ends

Installation Notes and Tips

Verify front inner position fitment before installation and inspect the hub, spindle, and sealing surfaces for wear or scoring. Clean all mating surfaces thoroughly and follow the vehicle service manual for bearing preload, torque, and lubrication procedures. Confirm the application by matching National A-55 to the original bearing specification before assembly.

Quality Assurance

National manufactures this bearing set with premium-grade steel and crowned raceways and rollers to support consistent load distribution in wheel-end service.