hub assemblies allow your vehicle to turn on its axle with low friction, as they are made up of different wheel end components wheel bearings support the weight of your vehicle and are able to function properly due to their pre sealed and pre greased design ABS sensors accurately measure the speed at which your vehicle travels as they are automatically checked 100% according to OE specifications after sensor assembly hub assemblies are able to secure the position of the tires at different speeds and endure the heat and friction from typical driving conditions due to their precise, engineered design easy installation and maintenance due to the accurate and calibrated settings of the bearings and seals