Get your semi Ready for the Road Ahead™ with proper alignment and reduced component wear, with the National Bearings 3.75" Inner Wheel Bearing Cone for 38K-48K Drive. This replacement bearing distributes the applied weight from various components, thanks to specialized design that features a low-friction spinning method. Engineered with a smooth metal assembly to reduce noise and excessive wear. FleetPride is your First Click in Heavy Duty®.