Wheel Bearing & Seal Kit: 69-78F Disc FrontSo many people don't change the bearings.. they change the tires.. the brake pads.. shocks.. but the entire life of a moving car.. the wheel bearings cop it. Replacing wheel bearing particularly when changing disc rotors or drums will make a marked difference in travel feel.. of the stability of the rotor so the brake calipers don't have to fight minor vibrations caused by worn bearings they simply don't last forever.. they stuff up occassionally