Equip your semi with proper alignment and reduced component wear, with the OTR 3.75" Inner Wheel Bearing Set for 38K-48K Drive with Expertise Built In™. By utilizing a specialized design that features a low-friction spinning method, this replacement bearing is able to distribute the applied weight from various components. Built with a smooth metal assembly to reduce noise and excessive wear. FleetPride is your First Click in Heavy Duty®.