PREMIUM SERIES Wheel Bearings are engineered for smooth, quiet rotation and long service life. Precision-machined raceways, heat-treated rolling elements, and premium synthetic grease work together to minimize friction and extend bearing life-meeting or exceeding OEM load and speed ratings for confident performance. Every bearing features 100% new sealed cages for contamination control, double-lip nitrile seals to lock out moisture and road debris, and CNC-ground raceways that ensure even load distribution. Components are dynamically balanced and rigorously vibration-tested, while the high-temperature grease maintains optimal lubrication across extreme operating ranges. From daily commuting to heavy-duty towing, PREMIUM SERIES Wheel Bearings restore factory-fresh ride quality and steering precision. Wheel Bearing WH500079 PRODUCT SPECIFICATIONS: (Hub Pilot Diameter (in):3.25) (Material:Steel)