Here's a list of things to inspect, clean or lubricate while the wheels are off for a tire change: (The wheels don't have to be off to do all of these maintenance points, and not all need to be done every time) >Check the wheel bearings for smoothness and play. >Clean and check the brake pads for wear; polish and grease the pin(s) very lightly with a silicone based grease.. >Clean the brake pistons and restore their motion in and out of the calipers evenly. This involves