Hubs & Bearings are critical components of a vehicle’s wheel assembly, facilitating both wheel rotation and vehicle load support. Wheel hubs mount to the vehicle’s suspension and provide a central mounting point for wheel bearings, axles, and brake rotors/calipers. Bearings within the assembly—typically ball, roller, or tapered roller types—minimize friction and allow smooth wheel rotation. These units are commonly replaced as a pre-assembled component to simplify service and ensure proper preload and sealing. Hub construction utilizes ductile iron or aluminum alloy for strength and weight reduction, while bearings feature heat-treated steel for durability.